feat: Gezeiten im Logbuch per Open-Meteo Marine

HW/NW-Felder im Reisetag und Live-Journal mit Server-Proxy auf Basis von
Open-Meteo Marine am GPS-Standort; neueste Position und frischer DB-Stand
vor dem Abruf, Bestätigung nach Übernehmen, Accordion-Layout bereinigt.

Co-authored-by: Cursor <cursoragent@cursor.com>

client/src/App.css

@@ -4607,6 +4607,41 @@ html.theme-cupertino .events-scroll-container {
   grid-column: 1 / -1;
 }
 
+/* Tides accordion (LogEntryEditor) */
+.tides-panel {
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+  margin-top: 16px;
+}
+
+.tides-panel__hints {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.tides-panel__hints .form-hint {
+  margin: 0;
+  font-size: 13px;
+  color: var(--app-text-muted);
+  line-height: 1.45;
+}
+
+.tides-panel__fields {
+  margin: 0;
+}
+
+.tides-panel__actions {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+}
+
+.tides-panel__actions .btn {
+  width: auto;
+}
+
 .metric-range-input--compact {
   gap: 0;
   margin: 0;

client/src/components/LiveLogView.tsx

@@ -19,6 +19,7 @@ import {
   Radio,
   Sailboat,
   Undo2,
+  Waves,
   Zap
 } from 'lucide-react'
 import { PlausibleEvents, trackPlausibleEvent } from '../services/analytics.js'
@@ -29,6 +30,7 @@ import {
   appendTankRefill as apiAppendTankRefill,
   findOrCreateTodayEntry,
   loadEntry,
+  patchEntryTides,
   removeLastEvent
 } from '../services/quickEventLog.js'
 import CreatorAvatar from './CreatorAvatar.tsx'
@@ -56,6 +58,9 @@ const formatSpeedKn = (speedKn: number) =>
   formatAppDecimal(speedKn, { minimumFractionDigits: 1, maximumFractionDigits: 1 })
 import { parseOwmCurrentWeather } from '../utils/openWeatherMap.js'
 import { fetchOpenWeatherCurrent, WeatherApiError } from '../services/weather.js'
+import { fetchTidesByPlace, fetchTidesNearby, TidesApiError } from '../services/tides.js'
+import { resolveTideFetchLocation } from '../utils/tideLocation.js'
+import { parseTideTurtleForDate } from '../utils/tideTurtle.js'
 import {
   geolocationErrorI18nKey,
   getCurrentPosition,
@@ -108,6 +113,7 @@ type LiveModal =
   | 'sog'
   | 'stw'
   | 'position'
+  | 'tides'
   | 'photo'
   | 'voice'
 
@@ -190,6 +196,7 @@ export default function LiveLogView({
   const [entryId, setEntryId] = useState<string | null>(null)
   const [dayOfTravel, setDayOfTravel] = useState('')
   const [date, setDate] = useState('')
+  const [departure, setDeparture] = useState('')
   const [events, setEvents] = useState<LogEventPayload[]>([])
   const [crewSnapshotsById, setCrewSnapshotsById] = useState<Record<string, any>>({})
   const [selectedSkipperId, setSelectedSkipperId] = useState<string | null>(null)
@@ -200,6 +207,15 @@ export default function LiveLogView({
   const [modal, setModal] = useState<LiveModal>('none')
   const [weatherExpanded, setWeatherExpanded] = useState(false)
   const [weatherOwmLoading, setWeatherOwmLoading] = useState(false)
+  const [tidesLoading, setTidesLoading] = useState(false)
+  const [tidePreview, setTidePreview] = useState<{
+    highWater: string
+    lowWater: string
+    placeName?: string
+    distanceKm?: number
+    source: 'gps' | 'departure'
+    departureQuery?: string
+  } | null>(null)
   const [isOnline, setIsOnline] = useState(navigator.onLine)
   const [commentText, setCommentText] = useState('')
   const [valueInput, setValueInput] = useState('')
@@ -301,6 +317,7 @@ export default function LiveLogView({
     const entryEvents = (loaded.data.events as LogEventPayload[]) || []
     setDayOfTravel(String(loaded.data.dayOfTravel || ''))
     setDate(String(loaded.data.date || ''))
+    setDeparture(String(loaded.data.departure || ''))
     setEvents(sortLogEventsByTime(entryEvents.map((e) => ({ ...e }))))
     setCrewSnapshotsById((loaded.data.crewSnapshotsById as Record<string, any>) || {})
     setSelectedSkipperId(typeof loaded.data.selectedSkipperId === 'string' ? loaded.data.selectedSkipperId : null)
@@ -784,6 +801,105 @@ export default function LiveLogView({
     })()
   }
 
+  const handleFetchTides = () => {
+    if (!entryId || busy || tidesLoading) return
+    if (!isOnline) {
+      void showAlert(t('logs.weather_offline'), t('logs.tides'))
+      return
+    }
+
+    setTidesLoading(true)
+    setError(null)
+    void (async () => {
+      try {
+        const loaded = await loadEntry(logbookId, entryId)
+        const eventsForLocation = loaded
+          ? sortLogEventsByTime((loaded.data.events as LogEventPayload[]) || [])
+          : events
+        const entryDateForLocation = loaded ? String(loaded.data.date || date) : date
+        const departureForLocation = loaded ? String(loaded.data.departure || departure) : departure
+
+        const location = resolveTideFetchLocation({
+          events: eventsForLocation,
+          entryDate: entryDateForLocation,
+          departure: departureForLocation
+        })
+        if ('error' in location) {
+          void showAlert(
+            location.error === 'stale'
+              ? t('logs.tide_position_stale')
+              : t('logs.tide_location_required'),
+            t('logs.tides')
+          )
+          return
+        }
+
+        const data =
+          location.mode === 'nearby'
+            ? await fetchTidesNearby(location.lat, location.lng, {
+                analyticsSource: 'live_log',
+                locationSource: location.source
+              })
+            : await fetchTidesByPlace(location.query, { analyticsSource: 'live_log' })
+
+        const parsed = parseTideTurtleForDate(data, date)
+        if (!parsed.highWater && !parsed.lowWater) {
+          void showAlert(t('logs.tide_no_data'), t('logs.tides'))
+          return
+        }
+
+        setTidePreview({
+          highWater: parsed.highWater,
+          lowWater: parsed.lowWater,
+          placeName: parsed.placeName,
+          distanceKm: parsed.distanceKm,
+          source: location.source,
+          departureQuery: location.mode === 'by-place' ? location.query : undefined
+        })
+        setModal('tides')
+      } catch (err) {
+        if (err instanceof TidesApiError) {
+          if (err.code === 'OFFLINE') {
+            void showAlert(t('logs.weather_offline'), t('logs.tides'))
+            return
+          }
+          if (err.code === 'PLACE_NOT_FOUND') {
+            void showAlert(t('logs.tide_place_not_found', { place: departure.trim() }), t('logs.tides'))
+            return
+          }
+          if (err.code === 'NOT_FOUND') {
+            void showAlert(t('logs.tide_no_data'), t('logs.tides'))
+            return
+          }
+        }
+        console.error('Live log tide fetch failed:', err)
+        void showAlert(t('logs.tide_fetch_failed'), t('logs.tides'))
+      } finally {
+        setTidesLoading(false)
+      }
+    })()
+  }
+
+  const confirmTides = () => {
+    if (!entryId || !tidePreview || busy) return
+    const preview = tidePreview
+    void runQuickAction(async () => {
+      await patchEntryTides(logbookId, entryId, {
+        highWater: preview.highWater,
+        lowWater: preview.lowWater
+      })
+      setTidePreview(null)
+      setModal('none')
+      void showAlert(
+        t('logs.tide_applied_success', {
+          highWater: preview.highWater || '—',
+          lowWater: preview.lowWater || '—'
+        }),
+        t('logs.tides')
+      )
+    }, 'tides', false)
+  }
+
   const handleUndo = () => {
     if (!entryId || busy) return
     const photoId = undoPhotoIdRef.current
@@ -1257,6 +1373,10 @@ export default function LiveLogView({
             <MapPin size={18} />
             {t('logs.live_position')}
           </button>
+          <button type="button" className="live-log-action-btn" onClick={handleFetchTides} disabled={busy || tidesLoading}>
+            <Waves size={18} />
+            {tidesLoading ? t('logs.tide_fetch_loading') : t('logs.tides')}
+          </button>
           <button type="button" className="live-log-action-btn" onClick={() => { setCommentText(''); setModal('comment') }} disabled={busy}>
             <MessageSquare size={18} />
             {t('logs.live_comment_btn')}
@@ -1455,6 +1575,56 @@ export default function LiveLogView({
         </div>
       )}
 
+      {modal === 'tides' && tidePreview && (
+        <div
+          className="live-log-modal-backdrop"
+          onClick={(e) => { if (e.target === e.currentTarget) closeModal() }}
+        >
+          <div className="live-log-modal" onClick={(e) => e.stopPropagation()}>
+            <h3>{t('logs.tides')}</h3>
+            <p className="live-log-modal-hint" role="note">
+              {t('logs.tide_disclaimer')}
+            </p>
+            {tidePreview.source === 'departure' && tidePreview.departureQuery ? (
+              <p className="live-log-modal-hint" role="status">
+                {t('logs.tide_fetched_from_departure', {
+                  place: tidePreview.placeName || tidePreview.departureQuery
+                })}
+              </p>
+            ) : tidePreview.source === 'gps' ? (
+              <p className="live-log-modal-hint" role="status">
+                {t('logs.tide_fetched_at_position')}
+              </p>
+            ) : tidePreview.placeName ? (
+              <p className="live-log-modal-hint" role="status">
+                {tidePreview.distanceKm != null
+                  ? t('logs.tide_fetched_from', {
+                      place: tidePreview.placeName,
+                      distance: formatAppDecimal(tidePreview.distanceKm, { maximumFractionDigits: 1 }) ?? String(tidePreview.distanceKm)
+                    })
+                  : tidePreview.placeName}
+              </p>
+            ) : null}
+            <dl className="live-log-tide-preview">
+              <div>
+                <dt>{t('logs.tide_high_water')}</dt>
+                <dd>{tidePreview.highWater || '—'}</dd>
+              </div>
+              <div>
+                <dt>{t('logs.tide_low_water')}</dt>
+                <dd>{tidePreview.lowWater || '—'}</dd>
+              </div>
+            </dl>
+            <div className="live-log-modal-actions">
+              <button type="button" className="btn secondary" onClick={closeModal}>{t('logs.live_cancel')}</button>
+              <button type="button" className="btn primary" onClick={confirmTides} disabled={busy}>
+                {t('logs.tide_apply')}
+              </button>
+            </div>
+          </div>
+        </div>
+      )}
+
       {modal === 'comment' && (
         <div className="live-log-modal-backdrop" onClick={() => setModal('none')}>
           <div className="live-log-modal" onClick={(e) => e.stopPropagation()}>

client/src/components/LogEntryEditor.tsx

@@ -8,7 +8,7 @@ import { syncLogbook } from '../services/sync.js'
 import { saveEntryDraft, clearEntryDraft } from '../services/entryDraft.js'
 import { getErrorMessage } from '../utils/errors.js'
 import { downloadLogbookPagePdf } from '../services/pdfExport.js'
-import { FileText, Save, ChevronLeft, Check, Compass, Plus, Trash2, MapPin, CloudSun, Clock, Download, Upload, Pencil, X, ChevronDown, ChevronUp, Sparkles, Sliders } from 'lucide-react'
+import { FileText, Save, ChevronLeft, Check, Compass, Plus, Trash2, MapPin, CloudSun, Clock, Download, Upload, Pencil, X, ChevronDown, ChevronUp, Sparkles, Sliders, Waves } from 'lucide-react'
 import PhotoCapture from './PhotoCapture.tsx'
 import EventRemarksCell from './EventRemarksCell.tsx'
 import CreatorAvatar from './CreatorAvatar.tsx'
@@ -33,7 +33,7 @@ import {
   hasAnySignature
 } from '../utils/signatures.js'
 import type { SignatureValue } from '../types/signatures.js'
-import { buildLogEntryPayload, sortLogEventsByTime, normalizeLogEvent, hasUnsavedEventDraft, currentLocalTimeHHMM, isValidTimeHHMM, type LogEventPayload } from '../utils/logEntryPayload.js'
+import { buildLogEntryPayload, readLogEntryTides, sortLogEventsByTime, normalizeLogEvent, hasUnsavedEventDraft, currentLocalTimeHHMM, isValidTimeHHMM, type LogEventPayload } from '../utils/logEntryPayload.js'
 import EventTimeInput24h from './EventTimeInput24h.tsx'
 import CourseDialInput from './CourseDialInput.tsx'
 import { parseOwmCurrentWeather } from '../utils/openWeatherMap.js'
@@ -43,13 +43,16 @@ import { putEntryRecord } from '../utils/entryListCache.js'
 import { getLogbookAccess } from '../services/logbookAccess.js'
 import { PlausibleEvents, trackPlausibleEvent } from '../services/analytics.js'
 import { fetchOpenWeatherCurrent, WeatherApiError } from '../services/weather.js'
+import { fetchTidesByPlace, fetchTidesNearby, TidesApiError } from '../services/tides.js'
+import { resolveTideFetchLocation } from '../utils/tideLocation.js'
+import { parseTideTurtleForDate } from '../utils/tideTurtle.js'
 import {
   buildTravelDayContext,
   fetchTravelDaySummaryUsage,
   generateTravelDaySummary,
   TravelDaySummaryApiError
 } from '../services/aiSummary.js'
-import { tryDecryptEntryPayload } from '../services/quickEventLog.js'
+import { loadEntry, tryDecryptEntryPayload } from '../services/quickEventLog.js'
 import { getAiAuthorized } from '../services/userPreferences.js'
 import {
   getDecryptedTrack,
@@ -107,6 +110,7 @@ import {
 } from '../utils/tankCapacity.js'
 import {
   formatAppCoordinate,
+  formatAppDecimal,
   parseAppDecimal,
   parseAppDecimalOrZero
 } from '../utils/numberFormat.js'
@@ -164,6 +168,7 @@ function fingerprintFromStoredEntry(decrypted: Record<string, unknown>): string
       motorHoursRaw != null && motorHoursRaw !== ''
         ? (parseAppDecimal(String(motorHoursRaw)) ?? undefined)
         : undefined,
+    tides: readLogEntryTides(decrypted),
     events: (decrypted.events as LogEventPayload[]) || [],
     entryCrew: entryCrewFromPreviousEntry(decrypted as Record<string, unknown>)
   })
@@ -298,6 +303,11 @@ export default function LogEntryEditor({
 
   const [eventsCollapsed, setEventsCollapsed] = useState(true)
   const [addEventFormCollapsed, setAddEventFormCollapsed] = useState(false)
+  const [tidesCollapsed, setTidesCollapsed] = useState(true)
+  const [tideHighWater, setTideHighWater] = useState('')
+  const [tideLowWater, setTideLowWater] = useState('')
+  const [tidesLoading, setTidesLoading] = useState(false)
+  const [tideFetchHint, setTideFetchHint] = useState('')
   const [tanksCollapsed, setTanksCollapsed] = useState(true)
 
   const [columnSelectorOpen, setColumnSelectorOpen] = useState(false)
@@ -430,6 +440,7 @@ export default function LogEntryEditor({
         consumption: parseAppDecimalOrZero(fuelConsumption)
       },
       greywater: { level: parseAppDecimalOrZero(greywaterLevel) },
+      tides: { highWater: tideHighWater, lowWater: tideLowWater },
       trackDistanceNm: parseOptionalFormDecimal(trackDistanceNm),
       trackSpeedMaxKn: parseOptionalFormDecimal(trackSpeedMaxKn),
       trackSpeedAvgKn: parseOptionalFormDecimal(trackSpeedAvgKn),
@@ -442,6 +453,7 @@ export default function LogEntryEditor({
     fwMorning, fwRefilled, fwEvening, fwConsumption,
     fuelMorning, fuelRefilled, fuelEvening, fuelConsumption,
     greywaterLevel,
+    tideHighWater, tideLowWater,
     trackDistanceNm, trackSpeedMaxKn, trackSpeedAvgKn, motorHours,
     events,
     entryCrew
@@ -921,6 +933,11 @@ export default function LogEntryEditor({
             setGreywaterLevel('0')
           }
 
+          const preloadedTides = readLogEntryTides(preloadedEntry as Record<string, unknown>)
+          setTideHighWater(preloadedTides.highWater)
+          setTideLowWater(preloadedTides.lowWater)
+          setTideFetchHint('')
+
           setSignSkipper(normalizeSignature(preloadedEntry.signSkipper) || '')
           setSignCrew(normalizeSignature(preloadedEntry.signCrew) || '')
           setEntryCrew(entryCrewFromPreviousEntry(preloadedEntry as Record<string, unknown>))
@@ -962,6 +979,11 @@ export default function LogEntryEditor({
               setGreywaterLevel('0')
             }
 
+            const loadedTides = readLogEntryTides(decrypted as Record<string, unknown>)
+            setTideHighWater(loadedTides.highWater)
+            setTideLowWater(loadedTides.lowWater)
+            setTideFetchHint('')
+
             setSignSkipper(normalizeSignature(decrypted.signSkipper) || '')
             setSignCrew(normalizeSignature(decrypted.signCrew) || '')
             setEntryCrew(entryCrewFromPreviousEntry(decrypted as Record<string, unknown>))
@@ -1271,6 +1293,93 @@ export default function LogEntryEditor({
     }
   }
 
+  const handleFetchTides = async () => {
+    if (!isOnline) {
+      showAlert(t('logs.weather_offline'), t('logs.tide_fetch_btn'))
+      return
+    }
+
+    setTidesLoading(true)
+    setTideFetchHint('')
+    try {
+      const loaded = await loadEntry(logbookId, entryId)
+      const eventsForLocation = loaded
+        ? sortLogEventsByTime((loaded.data.events as LogEventPayload[]) || [])
+        : events
+      const entryDateForLocation = loaded ? String(loaded.data.date || date) : date
+      const departureForLocation = loaded ? String(loaded.data.departure || departure) : departure
+
+      const location = resolveTideFetchLocation({
+        events: eventsForLocation,
+        entryDate: entryDateForLocation,
+        departure: departureForLocation
+      })
+      if ('error' in location) {
+        if (location.error === 'stale') {
+          showAlert(t('logs.tide_position_stale'), t('logs.tide_fetch_btn'))
+        } else {
+          showAlert(t('logs.tide_location_required'), t('logs.tide_fetch_btn'))
+        }
+        return
+      }
+
+      const data =
+        location.mode === 'nearby'
+          ? await fetchTidesNearby(location.lat, location.lng, {
+              analyticsSource: 'entry_editor',
+              locationSource: location.source
+            })
+          : await fetchTidesByPlace(location.query, { analyticsSource: 'entry_editor' })
+
+      const parsed = parseTideTurtleForDate(data, date)
+      if (!parsed.highWater && !parsed.lowWater) {
+        showAlert(t('logs.tide_no_data'), t('logs.tide_fetch_btn'))
+        return
+      }
+
+      if (parsed.highWater) setTideHighWater(parsed.highWater)
+      if (parsed.lowWater) setTideLowWater(parsed.lowWater)
+
+      if (location.source === 'departure') {
+        setTideFetchHint(
+          t('logs.tide_fetched_from_departure', {
+            place: parsed.placeName || location.query
+          })
+        )
+      } else if (location.source === 'gps') {
+        setTideFetchHint(t('logs.tide_fetched_at_position'))
+      } else if (parsed.placeName) {
+        setTideFetchHint(
+          parsed.distanceKm != null
+            ? t('logs.tide_fetched_from', {
+                place: parsed.placeName,
+                distance: formatAppDecimal(parsed.distanceKm, { maximumFractionDigits: 1 }) ?? String(parsed.distanceKm)
+              })
+            : parsed.placeName
+        )
+      }
+    } catch (err) {
+      if (err instanceof TidesApiError) {
+        if (err.code === 'OFFLINE') {
+          showAlert(t('logs.weather_offline'), t('logs.tide_fetch_btn'))
+          return
+        }
+        if (err.code === 'PLACE_NOT_FOUND') {
+          showAlert(t('logs.tide_place_not_found', { place: departure.trim() }), t('logs.tide_fetch_btn'))
+          return
+        }
+        if (err.code === 'NOT_FOUND') {
+          showAlert(t('logs.tide_no_data'), t('logs.tide_fetch_btn'))
+          return
+        }
+      }
+      console.error('Tide fetch failed:', err)
+      showAlert(t('logs.tide_fetch_failed'), t('logs.tide_fetch_btn'))
+    } finally {
+      setTidesLoading(false)
+    }
+  }
+
   const handleGenerateAiSummary = async () => {
     if (!canSignSkipper || readOnly || aiSummaryLoading) return
     if (!getAiAuthorized()) {
@@ -2113,6 +2222,77 @@ export default function LogEntryEditor({
           </div>
         )}
 
+        {/* Tides */}
+        <div className="form-card">
+          <div
+            className="form-header mb-4 accordion-header"
+            onClick={() => setTidesCollapsed(!tidesCollapsed)}
+            onKeyDown={(e) => {
+              if (e.key === 'Enter' || e.key === ' ') {
+                e.preventDefault()
+                setTidesCollapsed(!tidesCollapsed)
+              }
+            }}
+            role="button"
+            aria-expanded={!tidesCollapsed}
+            tabIndex={0}
+          >
+            <div className="accordion-header-title">
+              <Waves size={20} className="form-icon" />
+              <h3>{t('logs.tides')}</h3>
+            </div>
+            {tidesCollapsed ? <ChevronDown size={20} /> : <ChevronUp size={20} />}
+          </div>
+
+          {!tidesCollapsed && (
+            <div className="tides-panel">
+              <div className="tides-panel__hints">
+                <p className="form-hint" role="note">
+                  {t('logs.tide_disclaimer')}
+                </p>
+                {tideFetchHint ? (
+                  <p className="form-hint" role="status">
+                    {tideFetchHint}
+                  </p>
+                ) : null}
+              </div>
+              <div className="form-grid tides-panel__fields">
+                <div className="input-group">
+                  <label>{t('logs.tide_high_water')}</label>
+                  <EventTimeInput24h
+                    value={tideHighWater}
+                    onChange={setTideHighWater}
+                    disabled={readOnly || saving || tidesLoading}
+                    aria-label={t('logs.tide_high_water')}
+                  />
+                </div>
+                <div className="input-group">
+                  <label>{t('logs.tide_low_water')}</label>
+                  <EventTimeInput24h
+                    value={tideLowWater}
+                    onChange={setTideLowWater}
+                    disabled={readOnly || saving || tidesLoading}
+                    aria-label={t('logs.tide_low_water')}
+                  />
+                </div>
+              </div>
+              {!readOnly && (
+                <div className="tides-panel__actions">
+                  <button
+                    type="button"
+                    className="btn secondary"
+                    onClick={() => void handleFetchTides()}
+                    disabled={saving || tidesLoading}
+                  >
+                    <Waves size={16} />
+                    {tidesLoading ? t('logs.tide_fetch_loading') : t('logs.tide_fetch_btn')}
+                  </button>
+                </div>
+              )}
+            </div>
+          )}
+        </div>
+
         {/* Section 2: Tanks (Freshwater, Fuel, and Greywater) */}
         <div className="form-card">
           <div

client/src/i18n/locales/da.json

@@ -190,6 +190,22 @@
       "departure": "Afgangshavn (rejse fra)",
       "destination": "Ankomsthavn (til)",
       "route": "Rejse fra/til",
+      "tides": "Tidevand",
+      "tide_high_water": "Højvande",
+      "tide_low_water": "Lavvande",
+      "tide_fetch_btn": "Hent tidevand",
+      "tide_fetch_loading": "Henter tidevand…",
+      "tide_disclaimer": "Ingen garanti for rigtighed — kontrollér oplysningerne mod officielle kilder!",
+      "tide_location_required": "Tidevandsopslag kræver en aktuel position (max. 2 timer) eller en afgangshavn.",
+      "tide_position_stale": "Den sidste position er ældre end 2 timer. Log position igen eller angiv afgangshavn.",
+      "tide_fetch_failed": "Tidevand kunne ikke hentes.",
+      "tide_no_data": "Ingen tidevandsdata for dette sted.",
+      "tide_place_not_found": "“{{place}}” kunne ikke findes — angiv en kystby eller havn.",
+      "tide_fetched_at_position": "Modelprognose ved aktuel position (Open-Meteo Marine).",
+      "tide_fetched_from": "Data fra {{place}} (ca. {{distance}} km væk)",
+      "tide_fetched_from_departure": "Tidevand baseret på afgang “{{place}}” (ingen aktuel GPS-position).",
+      "tide_applied_success": "Tidevand overført: højvande {{highWater}}, lavvande {{lowWater}}. Synligt i rejsedagseditoren under “Tidevand”.",
+      "tide_apply": "Anvend",
       "tanks": "Tanke",
       "customize_columns": "Tilpas kolonner",
       "column_selector_title": "Kolonner, der skal vises",

client/src/i18n/locales/de.json

@@ -190,6 +190,22 @@
       "departure": "Start-Hafen (Reise von)",
       "destination": "Ziel-Hafen (nach)",
       "route": "Reise von/nach",
+      "tides": "Tiden",
+      "tide_high_water": "Hochwasser",
+      "tide_low_water": "Niedrigwasser",
+      "tide_fetch_btn": "Gezeiten abrufen",
+      "tide_fetch_loading": "Gezeiten werden geladen…",
+      "tide_disclaimer": "Keine Gewähr auf Richtigkeit — überprüfe die Informationen anhand offizieller Quellen!",
+      "tide_location_required": "Für den Gezeiten-Abruf wird eine aktuelle Position (max. 2 Stunden alt) oder ein Abfahrtsort benötigt.",
+      "tide_position_stale": "Die letzte Position ist älter als 2 Stunden. Bitte Position erneut setzen oder Abfahrtsort eintragen.",
+      "tide_fetch_failed": "Gezeiten konnten nicht abgerufen werden.",
+      "tide_no_data": "Für diesen Ort liegen keine Gezeitendaten vor.",
+      "tide_place_not_found": "„{{place}}“ konnte nicht geortet werden — bitte einen Küstenort oder Hafen angeben.",
+      "tide_fetched_at_position": "Modellprognose am aktuellen Standort (Open-Meteo Marine).",
+      "tide_fetched_from": "Daten von {{place}} (ca. {{distance}} km entfernt)",
+      "tide_fetched_from_departure": "Gezeiten basierend auf Abfahrtsort „{{place}}“ (keine aktuelle GPS-Position).",
+      "tide_applied_success": "Gezeiten übernommen: Hochwasser {{highWater}}, Niedrigwasser {{lowWater}}. Im Reisetag-Editor unter „Tiden“ sichtbar.",
+      "tide_apply": "Übernehmen",
       "tanks": "Tanks",
       "customize_columns": "Spalten anpassen",
       "column_selector_title": "Anzuzeigende Spalten",

client/src/i18n/locales/en.json

@@ -190,6 +190,22 @@
       "departure": "Departure Port (von)",
       "destination": "Destination Port (nach)",
       "route": "Route / Journey",
+      "tides": "Tides",
+      "tide_high_water": "High water",
+      "tide_low_water": "Low water",
+      "tide_fetch_btn": "Fetch tides",
+      "tide_fetch_loading": "Loading tides…",
+      "tide_disclaimer": "No guarantee of accuracy — verify against official sources!",
+      "tide_location_required": "Tide lookup needs a current position (max. 2 hours old) or a departure port.",
+      "tide_position_stale": "The last position is older than 2 hours. Log position again or enter a departure port.",
+      "tide_fetch_failed": "Could not fetch tide data.",
+      "tide_no_data": "No tide data available for this location.",
+      "tide_place_not_found": "“{{place}}” could not be geocoded — please use a coastal place or harbour name.",
+      "tide_fetched_at_position": "Model forecast at current position (Open-Meteo Marine).",
+      "tide_fetched_from": "Data from {{place}} (about {{distance}} km away)",
+      "tide_fetched_from_departure": "Tides based on departure “{{place}}” (no current GPS position).",
+      "tide_applied_success": "Tides applied: high water {{highWater}}, low water {{lowWater}}. Visible in the travel day editor under “Tides”.",
+      "tide_apply": "Apply",
       "tanks": "Tanks",
       "customize_columns": "Customize columns",
       "column_selector_title": "Columns to Show",

client/src/i18n/locales/es.json

@@ -190,6 +190,22 @@
       "departure": "Puerto de salida (viaje desde)",
       "destination": "Puerto de destino (a)",
       "route": "Viaje desde/hacia",
+      "tides": "Mareas",
+      "tide_high_water": "Pleamar",
+      "tide_low_water": "Bajamar",
+      "tide_fetch_btn": "Obtener mareas",
+      "tide_fetch_loading": "Cargando mareas…",
+      "tide_disclaimer": "Sin garantía de exactitud — comprueba con fuentes oficiales.",
+      "tide_location_required": "Las mareas requieren una posición actual (máx. 2 h) o un puerto de salida.",
+      "tide_position_stale": "La última posición tiene más de 2 horas. Registra la posición o indica el puerto de salida.",
+      "tide_fetch_failed": "No se pudieron obtener las mareas.",
+      "tide_no_data": "No hay datos de marea para este lugar.",
+      "tide_place_not_found": "«{{place}}» no se encontró — indica un lugar costero o puerto.",
+      "tide_fetched_at_position": "Pronóstico modelo en la posición actual (Open-Meteo Marine).",
+      "tide_fetched_from": "Datos de {{place}} (aprox. {{distance}} km)",
+      "tide_fetched_from_departure": "Mareas según salida «{{place}}» (sin posición GPS actual).",
+      "tide_applied_success": "Mareas guardadas: pleamar {{highWater}}, bajamar {{lowWater}}. Visible en el editor del día de viaje, sección «Mareas».",
+      "tide_apply": "Aplicar",
       "tanks": "Depósitos",
       "customize_columns": "Ajustar columnas",
       "column_selector_title": "Columnas que se deben mostrar",

client/src/i18n/locales/fr.json

@@ -190,6 +190,22 @@
       "departure": "Port de départ (départ de)",
       "destination": "Port de destination (vers)",
       "route": "Voyage au départ de/à destination de",
+      "tides": "Marées",
+      "tide_high_water": "Pleine mer",
+      "tide_low_water": "Basse mer",
+      "tide_fetch_btn": "Récupérer les marées",
+      "tide_fetch_loading": "Chargement des marées…",
+      "tide_disclaimer": "Aucune garantie d'exactitude — vérifiez auprès de sources officielles !",
+      "tide_location_required": "Les marées nécessitent une position actuelle (max. 2 h) ou un port de départ.",
+      "tide_position_stale": "La dernière position date de plus de 2 heures. Enregistrez la position ou indiquez le port de départ.",
+      "tide_fetch_failed": "Impossible de récupérer les marées.",
+      "tide_no_data": "Aucune donnée de marée pour cet endroit.",
+      "tide_place_not_found": "« {{place}} » introuvable — indiquez un lieu côtier ou un port.",
+      "tide_fetched_at_position": "Prévision modèle à la position actuelle (Open-Meteo Marine).",
+      "tide_fetched_from": "Données de {{place}} (env. {{distance}} km)",
+      "tide_fetched_from_departure": "Marées basées sur le départ « {{place}} » (pas de position GPS actuelle).",
+      "tide_applied_success": "Marées enregistrées : pleine mer {{highWater}}, basse mer {{lowWater}}. Visible dans l’éditeur du jour de voyage, section « Marées ».",
+      "tide_apply": "Appliquer",
       "tanks": "Réservoirs",
       "customize_columns": "Ajuster les colonnes",
       "column_selector_title": "Colonnes à afficher",

client/src/i18n/locales/nb.json

@@ -190,6 +190,22 @@
       "departure": "Avreisehavn (reise fra)",
       "destination": "Ankomsthavn (til)",
       "route": "Reise fra/til",
+      "tides": "Tidevann",
+      "tide_high_water": "Høyvann",
+      "tide_low_water": "Lavvann",
+      "tide_fetch_btn": "Hent tidevann",
+      "tide_fetch_loading": "Henter tidevann…",
+      "tide_disclaimer": "Ingen garanti for riktighet — kontroller opplysningene mot offisielle kilder!",
+      "tide_location_required": "Tidevann krever aktuell posisjon (maks 2 timer) eller avreisehavn.",
+      "tide_position_stale": "Siste posisjon er eldre enn 2 timer. Logg posisjon på nytt eller angi avreisehavn.",
+      "tide_fetch_failed": "Kunne ikke hente tidevann.",
+      "tide_no_data": "Ingen tidevannsdata for dette stedet.",
+      "tide_place_not_found": "«{{place}}» ble ikke funnet — oppgi en kyststad eller havn.",
+      "tide_fetched_at_position": "Modellprognose ved gjeldende posisjon (Open-Meteo Marine).",
+      "tide_fetched_from": "Data fra {{place}} (ca. {{distance}} km unna)",
+      "tide_fetched_from_departure": "Tidevann basert på avreise «{{place}}» (ingen aktuell GPS-posisjon).",
+      "tide_applied_success": "Tidevann lagret: høyvann {{highWater}}, lavvann {{lowWater}}. Synlig i reisedagseditoren under «Tidevann».",
+      "tide_apply": "Bruk",
       "tanks": "Tanker",
       "customize_columns": "Tilpass kolonner",
       "column_selector_title": "Kolonner som skal vises",

client/src/i18n/locales/sv.json

@@ -190,6 +190,22 @@
       "departure": "Avgångshamn (avresa från)",
       "destination": "Ankomsthamn (till)",
       "route": "Resa från/till",
+      "tides": "Tidvatten",
+      "tide_high_water": "Högvatten",
+      "tide_low_water": "Lågvatten",
+      "tide_fetch_btn": "Hämta tidvatten",
+      "tide_fetch_loading": "Hämtar tidvatten…",
+      "tide_disclaimer": "Ingen garanti för riktighet — verifiera mot officiella källor!",
+      "tide_location_required": "Tidvatten kräver aktuell position (max 2 timmar) eller avgångshamn.",
+      "tide_position_stale": "Senaste positionen är äldre än 2 timmar. Logga position igen eller ange avgångshamn.",
+      "tide_fetch_failed": "Kunde inte hämta tidvatten.",
+      "tide_no_data": "Inga tidvattendata för denna plats.",
+      "tide_place_not_found": "“{{place}}” kunde inte hittas — ange en kustort eller hamn.",
+      "tide_fetched_at_position": "Modellprognos vid aktuell position (Open-Meteo Marine).",
+      "tide_fetched_from": "Data från {{place}} (ca {{distance}} km bort)",
+      "tide_fetched_from_departure": "Tidvatten baserat på avgång “{{place}}” (ingen aktuell GPS-position).",
+      "tide_applied_success": "Tidvatten tillämpat: högvatten {{highWater}}, lågvatten {{lowWater}}. Syns i resedagseditorn under “Tidvatten”.",
+      "tide_apply": "Använd",
       "tanks": "Tankar",
       "customize_columns": "Anpassa kolumnerna",
       "column_selector_title": "Kolumner som ska visas",

client/src/services/analytics.ts

@@ -44,6 +44,7 @@ export const PlausibleEvents = {
   VOICE_MEMO_UPLOADED: 'Voice Memo Uploaded',
   VOICE_MEMO_TRANSCRIBED: 'Voice Memo Transcribed',
   OWM_WEATHER_FETCHED: 'OWM Weather Fetched',
+  TIDE_FETCHED: 'Tide Fetched',
   AI_SUMMARY_GENERATED: 'AI Summary Generated',
   PWA_BOOT_WATCHDOG_SOFT: 'PWA Boot Watchdog Soft',
   PWA_BOOT_WATCHDOG_HARD: 'PWA Boot Watchdog Hard',
@@ -54,6 +55,8 @@ export const PlausibleEvents = {
 /** Where a successful OpenWeatherMap API call originated (no coordinates or place names). */
 export type OwmAnalyticsSource = 'live_log' | 'entry_editor' | 'entry_editor_gps_lookup'
 
+export type TideAnalyticsSource = 'live_log' | 'entry_editor'
+
 export type PlausibleEventName = (typeof PlausibleEvents)[keyof typeof PlausibleEvents]
 
 export type PlausibleEventProps = Record<string, string | number | boolean>

client/src/services/quickEventLog.ts

@@ -7,9 +7,11 @@ import { putEntryRecord } from '../utils/entryListCache.js'
 import {
   buildLogEntryPayload,
   normalizeLogEvent,
+  readLogEntryTides,
   sortLogEventsByTime,
   currentLocalTimeHHMM,
   localDateString,
+  type LogEntryTides,
   type LogEventPayload
 } from '../utils/logEntryPayload.js'
 import {
@@ -75,6 +77,7 @@ function buildEncryptedPayload(
     destination?: string
     freshwater?: { morning: number; refilled: number; evening: number; consumption: number }
     fuel?: { morning: number; refilled: number; evening: number; consumption: number }
+    tides?: LogEntryTides
     clearSignatures?: boolean
   }
 ): Record<string, unknown> {
@@ -113,6 +116,7 @@ function buildEncryptedPayload(
     freshwater,
     fuel: fuelLevels,
     greywater: gw ? { level: gw.level || 0 } : undefined,
+    tides: options.tides ?? readLogEntryTides(data),
     trackDistanceNm:
       trackDistance != null && trackDistance !== ''
         ? parseFloat(String(trackDistance))
@@ -398,6 +402,24 @@ export async function appendQuickEvents(
   return { events: nextEvents, hadSignature }
 }
 
+export async function patchEntryTides(
+  logbookId: string,
+  entryId: string,
+  tides: LogEntryTides
+): Promise<void> {
+  const loaded = await loadEntry(logbookId, entryId)
+  if (!loaded) throw new Error('Entry not found')
+
+  const hadSignature = !!(loaded.data.signSkipper || loaded.data.signCrew)
+  const currentEvents = (loaded.data.events as LogEventPayload[]) || []
+
+  await persistEntry(logbookId, entryId, loaded.data, {
+    events: currentEvents,
+    tides,
+    clearSignatures: hadSignature
+  })
+}
+
 async function persistEntry(
   logbookId: string,
   entryId: string,

client/src/services/tides.ts

@@ -0,0 +1,91 @@
+import { apiFetch } from './api.js'
+import {
+  type TideAnalyticsSource,
+  PlausibleEvents,
+  trackPlausibleEvent
+} from './analytics.js'
+
+export class TidesApiError extends Error {
+  code: 'OFFLINE' | 'NOT_FOUND' | 'PLACE_NOT_FOUND' | 'BAD_REQUEST' | 'REQUEST_FAILED'
+
+  constructor(
+    message: string,
+    code: 'OFFLINE' | 'NOT_FOUND' | 'PLACE_NOT_FOUND' | 'BAD_REQUEST' | 'REQUEST_FAILED' = 'REQUEST_FAILED'
+  ) {
+    super(message)
+    this.name = 'TidesApiError'
+    this.code = code
+  }
+}
+
+const TIDES_FETCH_TIMEOUT_MS = 20_000
+
+async function fetchTides(path: string): Promise<Record<string, unknown>> {
+  if (!navigator.onLine) {
+    throw new TidesApiError('Offline', 'OFFLINE')
+  }
+
+  const controller = new AbortController()
+  const timeoutId = window.setTimeout(() => controller.abort(), TIDES_FETCH_TIMEOUT_MS)
+  let res: Response
+  try {
+    res = await apiFetch(path, { signal: controller.signal })
+  } catch (err) {
+    if (err instanceof DOMException && err.name === 'AbortError') {
+      throw new TidesApiError('Tide request timed out')
+    }
+    throw err
+  } finally {
+    window.clearTimeout(timeoutId)
+  }
+
+  const data = await res.json().catch(() => ({}))
+  if (res.status === 400) {
+    throw new TidesApiError('Invalid tide request parameters', 'BAD_REQUEST')
+  }
+  if (res.status === 404) {
+    const code =
+      typeof data?.error === 'string' && data.error === 'place_not_found'
+        ? 'PLACE_NOT_FOUND'
+        : 'NOT_FOUND'
+    throw new TidesApiError('Tide data not found', code)
+  }
+  if (!res.ok) {
+    throw new TidesApiError(
+      typeof data?.error === 'string' ? data.error : 'Tide API rejected the request'
+    )
+  }
+
+  return data as Record<string, unknown>
+}
+
+export async function fetchTidesNearby(
+  lat: string,
+  lon: string,
+  options?: { analyticsSource?: TideAnalyticsSource; locationSource?: 'gps' | 'departure' }
+): Promise<Record<string, unknown>> {
+  const searchParams = new URLSearchParams({ lat, lon })
+  const data = await fetchTides(`/api/tides/nearby?${searchParams.toString()}`)
+  if (options?.analyticsSource) {
+    trackPlausibleEvent(PlausibleEvents.TIDE_FETCHED, {
+      source: options.analyticsSource,
+      location_source: options.locationSource ?? 'gps'
+    })
+  }
+  return data
+}
+
+export async function fetchTidesByPlace(
+  placeQuery: string,
+  options?: { analyticsSource?: TideAnalyticsSource }
+): Promise<Record<string, unknown>> {
+  const searchParams = new URLSearchParams({ q: placeQuery.trim() })
+  const data = await fetchTides(`/api/tides/by-place?${searchParams.toString()}`)
+  if (options?.analyticsSource) {
+    trackPlausibleEvent(PlausibleEvents.TIDE_FETCHED, {
+      source: options.analyticsSource,
+      location_source: 'departure'
+    })
+  }
+  return data
+}

client/src/utils/liveEventCodes.ts

@@ -154,6 +154,9 @@ export function getLastAutoPositionMs(
 /** Max age of a logged position for OpenWeatherMap lookups in live log. */
 export const LIVE_LOG_WEATHER_POSITION_MAX_AGE_MS = 6 * 60 * 60 * 1000
 
+/** Max age of a logged position for tide lookups (TideTurtle). */
+export const LIVE_LOG_TIDE_POSITION_MAX_AGE_MS = 2 * 60 * 60 * 1000
+
 export type LiveLogPositionSource = 'position' | 'auto_position'
 
 export interface LiveLogPosition {
@@ -176,7 +179,10 @@ export function getLatestLoggedPosition(
   events: Array<{ remarks: string; time: string; gpsLat?: string; gpsLng?: string }>,
   entryDate: string
 ): LiveLogPosition | null {
-  for (let i = events.length - 1; i >= 0; i--) {
+  let best: LiveLogPosition | null = null
+  let bestIndex = -1
+
+  for (let i = 0; i < events.length; i++) {
     const event = events[i]
     const code = event.remarks.trim()
     if (!isPositionEventCode(code)) continue
@@ -185,14 +191,25 @@ export function getLatestLoggedPosition(
     if (!lat || !lng) continue
     const loggedAtMs = eventTimestampMs(entryDate, event.time)
     if (loggedAtMs == null) continue
-    return {
+
+    const candidate: LiveLogPosition = {
       lat,
       lng,
       loggedAtMs,
       source: isManualPositionEventCode(code) ? 'position' : 'auto_position'
     }
+
+    if (
+      !best ||
+      candidate.loggedAtMs > best.loggedAtMs ||
+      (candidate.loggedAtMs === best.loggedAtMs && i > bestIndex)
+    ) {
+      best = candidate
+      bestIndex = i
     }
-  return null
+  }
+
+  return best
 }
 
 /** Logged position for weather if recorded within `maxAgeMs` (default 6 h). */

client/src/utils/liveLogPosition.test.ts

@@ -19,6 +19,16 @@ describe('live log position', () => {
     expect(position?.source).toBe('position')
   })
 
+  it('picks latest position by event time even when array is not sorted', () => {
+    const entryDate = '2026-06-01'
+    const events = [
+      { remarks: LIVE_EVENT_CODES.POSITION, time: '14:16', gpsLat: '54.12', gpsLng: '10.65' },
+      { remarks: LIVE_EVENT_CODES.POSITION, time: '14:03', gpsLat: '53.62', gpsLng: '7.15' }
+    ]
+    const position = getLatestLoggedPosition(events, entryDate)
+    expect(position?.lat).toBe('54.12')
+  })
+
   it('reads legacy __live:fix remarks', () => {
     const entryDate = '2026-06-01'
     const events = [

client/src/utils/logEntryPayload.test.ts

@@ -72,3 +72,23 @@ describe('buildLogEntryPayload greywater', () => {
     expect(payload.greywater).toBeUndefined()
   })
 })
+
+describe('buildLogEntryPayload tides', () => {
+  const base = {
+    date: '2026-06-11',
+    dayOfTravel: '1',
+    departure: 'Norddeich',
+    destination: 'Juist',
+    freshwater: { morning: 0, refilled: 0, evening: 0, consumption: 0 },
+    fuel: { morning: 0, refilled: 0, evening: 0, consumption: 0 },
+    events: [] as LogEventPayload[]
+  }
+
+  it('persists high and low water times', () => {
+    const payload = buildLogEntryPayload({
+      ...base,
+      tides: { highWater: '18:34', lowWater: '12:05' }
+    })
+    expect(payload.tides).toEqual({ highWater: '18:34', lowWater: '12:05' })
+  })
+})

client/src/utils/logEntryPayload.ts

@@ -150,6 +150,11 @@ export function sortLogEventsByTime<T extends LogEventPayload>(events: T[]): T[]
   return [...events].sort((a, b) => (a.time || '').localeCompare(b.time || ''))
 }
 
+export interface LogEntryTides {
+  highWater: string
+  lowWater: string
+}
+
 export interface LogEntryPayloadInput {
   date: string
   dayOfTravel: string
@@ -158,6 +163,7 @@ export interface LogEntryPayloadInput {
   freshwater: { morning: number; refilled: number; evening: number; consumption: number }
   fuel: { morning: number; refilled: number; evening: number; consumption: number }
   greywater?: { level: number }
+  tides?: LogEntryTides
   trackDistanceNm?: number
   trackSpeedMaxKn?: number
   trackSpeedAvgKn?: number
@@ -166,6 +172,16 @@ export interface LogEntryPayloadInput {
   entryCrew?: EntryCrewFields
 }
 
+export function readLogEntryTides(data: Record<string, unknown>): LogEntryTides {
+  const tides = data.tides as Record<string, unknown> | undefined
+  const highRaw = String(tides?.highWater ?? '').trim()
+  const lowRaw = String(tides?.lowWater ?? '').trim()
+  return {
+    highWater: parseTimeToHHMM(highRaw) ?? '',
+    lowWater: parseTimeToHHMM(lowRaw) ?? ''
+  }
+}
+
 export function buildLogEntryPayload(input: LogEntryPayloadInput): Record<string, unknown> {
   const payload: Record<string, unknown> = {
     date: input.date,
@@ -191,6 +207,14 @@ export function buildLogEntryPayload(input: LogEntryPayloadInput): Record<string
     }
   }
 
+  if (input.tides) {
+    const highWater = parseTimeToHHMM(input.tides.highWater) ?? ''
+    const lowWater = parseTimeToHHMM(input.tides.lowWater) ?? ''
+    if (highWater || lowWater) {
+      payload.tides = { highWater, lowWater }
+    }
+  }
+
   if (input.entryCrew) {
     payload.selectedSkipperId = input.entryCrew.selectedSkipperId
     payload.selectedCrewIds = [...input.entryCrew.selectedCrewIds]

client/src/utils/tideLocation.test.ts

@@ -0,0 +1,120 @@
+import { describe, expect, it } from 'vitest'
+import { LIVE_EVENT_CODES } from './liveEventCodes.js'
+import { resolveTideFetchLocation } from './tideLocation.js'
+
+const entryDate = '2026-06-11'
+const nowMs = new Date('2026-06-11T12:00:00').getTime()
+
+describe('resolveTideFetchLocation', () => {
+  it('uses chronologically latest position when several are logged', () => {
+    const result = resolveTideFetchLocation({
+      events: [
+        {
+          time: '14:03',
+          remarks: LIVE_EVENT_CODES.POSITION,
+          gpsLat: '53.624526',
+          gpsLng: '7.155263'
+        },
+        {
+          time: '14:16',
+          remarks: LIVE_EVENT_CODES.POSITION,
+          gpsLat: '54.120000',
+          gpsLng: '10.650000'
+        }
+      ],
+      entryDate,
+      departure: 'Norddeich',
+      nowMs
+    })
+    expect(result).toEqual({
+      mode: 'nearby',
+      lat: '54.120000',
+      lng: '10.650000',
+      source: 'gps'
+    })
+  })
+
+  it('prefers fresh GPS position', () => {
+    const result = resolveTideFetchLocation({
+      events: [
+        {
+          time: '11:30',
+          remarks: LIVE_EVENT_CODES.POSITION,
+          gpsLat: '54.32',
+          gpsLng: '10.14'
+        }
+      ],
+      entryDate,
+      departure: 'Kiel',
+      nowMs
+    })
+    expect(result).toEqual({
+      mode: 'nearby',
+      lat: '54.32',
+      lng: '10.14',
+      source: 'gps'
+    })
+  })
+
+  it('falls back to departure when no position', () => {
+    const result = resolveTideFetchLocation({
+      events: [],
+      entryDate,
+      departure: 'Sylt',
+      nowMs
+    })
+    expect(result).toEqual({
+      mode: 'by-place',
+      query: 'Sylt',
+      source: 'departure'
+    })
+  })
+
+  it('falls back to departure when position is stale', () => {
+    const result = resolveTideFetchLocation({
+      events: [
+        {
+          time: '08:00',
+          remarks: LIVE_EVENT_CODES.POSITION,
+          gpsLat: '54.32',
+          gpsLng: '10.14'
+        }
+      ],
+      entryDate,
+      departure: 'Kiel',
+      nowMs
+    })
+    expect(result).toEqual({
+      mode: 'by-place',
+      query: 'Kiel',
+      source: 'departure'
+    })
+  })
+
+  it('returns stale without departure', () => {
+    const result = resolveTideFetchLocation({
+      events: [
+        {
+          time: '08:00',
+          remarks: LIVE_EVENT_CODES.POSITION,
+          gpsLat: '54.32',
+          gpsLng: '10.14'
+        }
+      ],
+      entryDate,
+      departure: '',
+      nowMs
+    })
+    expect(result).toEqual({ error: 'stale' })
+  })
+
+  it('returns missing without position or departure', () => {
+    const result = resolveTideFetchLocation({
+      events: [],
+      entryDate,
+      departure: '',
+      nowMs
+    })
+    expect(result).toEqual({ error: 'missing' })
+  })
+})

client/src/utils/tideLocation.ts

@@ -0,0 +1,47 @@
+import {
+  getLastLoggedPositionWithin,
+  getLatestLoggedPosition,
+  LIVE_LOG_TIDE_POSITION_MAX_AGE_MS
+} from './liveEventCodes.js'
+import type { LogEventPayload } from './logEntryPayload.js'
+
+export type TideLocationSource = 'gps' | 'departure'
+
+export type TideFetchLocation =
+  | { mode: 'nearby'; lat: string; lng: string; source: 'gps' }
+  | { mode: 'by-place'; query: string; source: 'departure' }
+
+export type TideLocationError = 'stale' | 'missing'
+
+export function resolveTideFetchLocation(options: {
+  events: Array<Pick<LogEventPayload, 'remarks' | 'time' | 'gpsLat' | 'gpsLng'>>
+  entryDate: string
+  departure: string
+  maxAgeMs?: number
+  nowMs?: number
+}): TideFetchLocation | { error: TideLocationError } {
+  const maxAgeMs = options.maxAgeMs ?? LIVE_LOG_TIDE_POSITION_MAX_AGE_MS
+  const nowMs = options.nowMs ?? Date.now()
+  const departure = options.departure.trim()
+
+  const fresh = getLastLoggedPositionWithin(
+    options.events,
+    options.entryDate,
+    maxAgeMs,
+    nowMs
+  )
+  if (fresh) {
+    return { mode: 'nearby', lat: fresh.lat, lng: fresh.lng, source: 'gps' }
+  }
+
+  if (departure) {
+    return { mode: 'by-place', query: departure, source: 'departure' }
+  }
+
+  const latest = getLatestLoggedPosition(options.events, options.entryDate)
+  if (latest && nowMs - latest.loggedAtMs > maxAgeMs) {
+    return { error: 'stale' }
+  }
+
+  return { error: 'missing' }
+}

client/src/utils/tideTurtle.test.ts

@@ -0,0 +1,53 @@
+import { describe, expect, it } from 'vitest'
+import { parseTideTurtleForDate } from './tideTurtle.js'
+
+const sampleNearby = {
+  distanceKm: 1.2,
+  place: { name: 'Kiel' },
+  tides: {
+    data: {
+      timezone: 'Europe/Berlin',
+      extrema: [
+        { time: '2026-06-11T08:50:00.000Z', date: '2026-06-11', height: 0.5, isHigh: true },
+        { time: '2026-06-11T14:34:00.000Z', date: '2026-06-11', height: -0.2, isHigh: false },
+        { time: '2026-06-12T09:00:00.000Z', date: '2026-06-12', height: 0.6, isHigh: true }
+      ]
+    }
+  }
+}
+
+describe('parseTideTurtleForDate', () => {
+  it('returns first high and low on entry date in local timezone', () => {
+    const parsed = parseTideTurtleForDate(sampleNearby, '2026-06-11')
+    expect(parsed.highWater).toBe('10:50')
+    expect(parsed.lowWater).toBe('16:34')
+    expect(parsed.placeName).toBe('Kiel')
+    expect(parsed.distanceKm).toBe(1.2)
+  })
+
+  it('reads Open-Meteo coordinate response without distance', () => {
+    const parsed = parseTideTurtleForDate(
+      {
+        location: { source: 'coordinates', lat: 53.62, lon: 7.15 },
+        tides: sampleNearby.tides
+      },
+      '2026-06-11'
+    )
+    expect(parsed.highWater).toBe('10:50')
+    expect(parsed.distanceKm).toBeUndefined()
+  })
+
+  it('leaves missing tide type empty', () => {
+    const parsed = parseTideTurtleForDate(
+      {
+        data: {
+          timezone: 'UTC',
+          extrema: [{ time: '2026-06-11T12:00:00.000Z', date: '2026-06-11', height: 1, isHigh: true }]
+        }
+      },
+      '2026-06-11'
+    )
+    expect(parsed.highWater).toBe('12:00')
+    expect(parsed.lowWater).toBe('')
+  })
+})

client/src/utils/tideTurtle.ts

@@ -0,0 +1,108 @@
+export interface TideExtreme {
+  time: string
+  date: string
+  height: number
+  isHigh: boolean
+}
+
+export interface ParsedTideTimes {
+  highWater: string
+  lowWater: string
+  placeName?: string
+  distanceKm?: number
+  timezone: string
+}
+
+function isoToHHMM(iso: string, timeZone: string): string {
+  const d = new Date(iso)
+  if (Number.isNaN(d.getTime())) return ''
+  const parts = new Intl.DateTimeFormat('en-GB', {
+    timeZone,
+    hour: '2-digit',
+    minute: '2-digit',
+    hour12: false
+  }).formatToParts(d)
+  const hour = parts.find((p) => p.type === 'hour')?.value ?? '00'
+  const minute = parts.find((p) => p.type === 'minute')?.value ?? '00'
+  return `${hour}:${minute}`
+}
+
+function asRecord(value: unknown): Record<string, unknown> | null {
+  return value && typeof value === 'object' && !Array.isArray(value)
+    ? (value as Record<string, unknown>)
+    : null
+}
+
+function readExtrema(data: Record<string, unknown>): TideExtreme[] {
+  const raw = data.extrema
+  if (!Array.isArray(raw)) return []
+  const out: TideExtreme[] = []
+  for (const item of raw) {
+    const row = asRecord(item)
+    if (!row) continue
+    const time = String(row.time ?? '').trim()
+    const date = String(row.date ?? '').trim()
+    if (!time || !date) continue
+    out.push({
+      time,
+      date,
+      height: Number(row.height ?? 0),
+      isHigh: row.isHigh === true || row.type === 'high'
+    })
+  }
+  return out
+}
+
+/** Normalize TideTurtle nearby or place JSON into extrema + metadata. */
+export function extractTideTurtlePayload(data: Record<string, unknown>): {
+  extrema: TideExtreme[]
+  timezone: string
+  placeName?: string
+  distanceKm?: number
+} {
+  const place = asRecord(data.place)
+  const location = asRecord(data.location)
+  const tidesRoot = asRecord(data.tides) ?? data
+  const tidesData = asRecord(tidesRoot.data) ?? tidesRoot
+  const spatial = asRecord(tidesData.spatialCoverage) ?? asRecord(data.spatialCoverage)
+
+  const timezone = String(tidesData.timezone ?? 'UTC')
+  const extrema = readExtrema(tidesData)
+
+  let placeName = place?.name ? String(place.name) : undefined
+  if (!placeName && location?.name) placeName = String(location.name)
+  if (!placeName && spatial?.name) placeName = String(spatial.name)
+
+  const distanceKm =
+    location?.source === 'coordinates'
+      ? undefined
+      : data.distanceKm != null && data.distanceKm !== ''
+        ? Number(data.distanceKm)
+        : undefined
+
+  return { extrema, timezone, placeName, distanceKm }
+}
+
+/** First high and first low tide on entryDate (YYYY-MM-DD). */
+export function parseTideTurtleForDate(
+  data: Record<string, unknown>,
+  entryDate: string
+): ParsedTideTimes {
+  const { extrema, timezone, placeName, distanceKm } = extractTideTurtlePayload(data)
+
+  let highWater = ''
+  let lowWater = ''
+
+  for (const extreme of extrema) {
+    if (extreme.date !== entryDate) continue
+    if (extreme.isHigh && !highWater) {
+      highWater = isoToHHMM(extreme.time, timezone)
+    }
+    if (!extreme.isHigh && !lowWater) {
+      lowWater = isoToHHMM(extreme.time, timezone)
+    }
+    if (highWater && lowWater) break
+  }
+
+  return { highWater, lowWater, placeName, distanceKm, timezone }
+}

docs/plausible-events.md

@@ -49,6 +49,7 @@ Das Script wird über `plausible-bootstrap.js` geladen; `data-domain` ist der ak
 | Voice Memo Uploaded | Sprachnotiz gespeichert (`voiceAttachments.ts`) | `context`: `logbook` \| `live_log` |
 | Voice Memo Transcribed | Sprachmemo transkribiert (`LiveLogView.tsx`, `EventRemarksCell.tsx`) | `status`: `success` \| `failed`, `mode`: `auto` (beim Speichern) \| `manual` (nachträglich) |
 | OWM Weather Fetched | Erfolgreicher OpenWeatherMap-API-Abruf (`weather.ts`, zentral nach HTTP 200) | `source`: siehe [OWM-Quellen](#owm-quellen) |
+| Tide Fetched | Erfolgreicher TideTurtle-Abruf (`tides.ts`) | `source`: `live_log` \| `entry_editor`; `location_source`: `gps` \| `departure` |
 | AI Summary Generated | Erfolgreiche KI-Zusammenfassung eines Reisetags (`aiSummary.ts`) | — |
 | Backup Exported | Backup-Datei heruntergeladen (`LogbookBackupPanel.tsx`, v2 ZIP) | `entries`, `photos`, `voiceMemos`, `bytes` (Anzahlen/Größe, keine Inhalte) |
 | Backup Restored | Backup wiederhergestellt (`LogbookBackupPanel.tsx`, v2 ZIP) | `entries`, `photos`, `voiceMemos`, `bytes`, `mode`: `same_id` \| `overwrite` \| `new_id` |
@@ -148,7 +149,7 @@ Empfohlene Goal-Ketten für Auswertung (nur Business!):
 8. **Internationalisierung:** Language Changed (Verteilung `to`, Pfade mit Übersetzungs-Feedback)
 9. **NMEA-Import:** NMEA Uploaded → NMEA Imported (Modus, `events`, optional Track; Upload-Funnel vs. Abbruch)
 10. **Live-Journal:** Live Log Opened → Live Log Event Logged (Verteilung `action`; z. B. `position`, `course`, `motor_start`) → Photo Uploaded / Voice Memo Uploaded (Filter `context`: `live_log`)
-11. **OpenWeatherMap:** OWM Weather Fetched (Verteilung `source`; Live-Journal vs. Reisetag-Editor)
+11. **OpenWeatherMap / Gezeiten:** OWM Weather Fetched (Verteilung `source`); Tide Fetched (Verteilung `location_source`)
 12. **PWA-Stabilitaet:** PWA Boot Watchdog Soft → PWA Boot Watchdog Hard → PWA Boot Watchdog Fallback → PWA Boot Watchdog Manual Repair
 
 ## Entwicklung

server/src/app.ts

@@ -10,6 +10,7 @@ import collaborationRouter from './routes/collaboration.js'
 import signRouter from './routes/sign.js'
 import pushRouter from './routes/push.js'
 import weatherRouter from './routes/weather.js'
+import tidesRouter from './routes/tides.js'
 import aiRouter from './routes/ai.js'
 import feedbackRouter from './routes/feedback.js'
 import adminRouter from './routes/admin.js'
@@ -120,6 +121,7 @@ export function createApp(): express.Express {
   app.use('/api/sign', signRouter)
   app.use('/api/push', pushRouter)
   app.use('/api/weather', weatherRouter)
+  app.use('/api/tides', tidesRouter)
   app.use('/api/ai', aiRouter)
   app.use('/api/feedback', feedbackRouter)
   app.use('/api/admin', adminRouter)

server/src/routes/tides.ts

@@ -0,0 +1,60 @@
+import { Router } from 'express'
+import { requireUser } from '../middleware/auth.js'
+import {
+  fetchTidesForCoordinates,
+  fetchTidesForPlace
+} from '../utils/openMeteoTides.js'
+
+const router = Router()
+
+function parseLatLon(lat: unknown, lon: unknown): { lat: number; lon: number } | null {
+  const latNum = Number(lat)
+  const lonNum = Number(lon)
+  if (Number.isNaN(latNum) || Number.isNaN(lonNum)) return null
+  if (latNum < -90 || latNum > 90 || lonNum < -180 || lonNum > 180) return null
+  return { lat: latNum, lon: lonNum }
+}
+
+router.get('/nearby', requireUser, async (req, res) => {
+  try {
+    const coords = parseLatLon(req.query.lat, req.query.lon)
+    if (!coords) {
+      return res.status(400).json({ error: 'lat and lon are required' })
+    }
+
+    const data = await fetchTidesForCoordinates(coords.lat, coords.lon)
+    return res.json(data)
+  } catch (error: unknown) {
+    const message = error instanceof Error ? error.message : 'Tide lookup failed'
+    if (message === 'no_tide_data') {
+      return res.status(404).json({ error: 'no_tide_data' })
+    }
+    console.error('Error fetching nearby tides:', error)
+    return res.status(502).json({ error: message })
+  }
+})
+
+router.get('/by-place', requireUser, async (req, res) => {
+  try {
+    const query = typeof req.query.q === 'string' ? req.query.q.trim() : ''
+    if (!query) {
+      return res.status(400).json({ error: 'q is required' })
+    }
+
+    const data = await fetchTidesForPlace(query)
+    return res.json(data)
+  } catch (error: unknown) {
+    const status = (error as { status?: number }).status
+    const message = error instanceof Error ? error.message : 'Tide lookup failed'
+    if (status === 404 || message === 'place_not_found') {
+      return res.status(404).json({ error: 'place_not_found' })
+    }
+    if (message === 'no_tide_data') {
+      return res.status(404).json({ error: 'no_tide_data' })
+    }
+    console.error('Error fetching place tides:', error)
+    return res.status(502).json({ error: message })
+  }
+})
+
+export default router

server/src/utils/openMeteoTides.test.ts

@@ -0,0 +1,22 @@
+import { describe, expect, it } from 'vitest'
+import { findSeaLevelExtrema } from './openMeteoTides.js'
+
+describe('findSeaLevelExtrema', () => {
+  it('detects one high and one low from a simple sinusoidal day', () => {
+    const times = [
+      '2026-06-11T00:00',
+      '2026-06-11T01:00',
+      '2026-06-11T02:00',
+      '2026-06-11T03:00',
+      '2026-06-11T04:00',
+      '2026-06-11T05:00',
+      '2026-06-11T06:00'
+    ]
+    const levels = [1.0, 0.0, -1.0, 0.0, 1.0, 0.0, -1.0]
+    const extrema = findSeaLevelExtrema(times, levels, 'Europe/Berlin')
+
+    expect(extrema.some((e) => e.isHigh)).toBe(true)
+    expect(extrema.some((e) => !e.isHigh)).toBe(true)
+    expect(extrema.every((e) => e.date === '2026-06-11')).toBe(true)
+  })
+})

server/src/utils/openMeteoTides.ts

@@ -0,0 +1,249 @@
+const MARINE_API = 'https://marine-api.open-meteo.com/v1/marine'
+const GEOCODING_API = 'https://geocoding-api.open-meteo.com/v1/search'
+const FETCH_TIMEOUT_MS = 15_000
+const FORECAST_DAYS = 7
+
+export interface TideExtreme {
+  time: string
+  date: string
+  height: number
+  isHigh: boolean
+}
+
+export interface TideLookupResult {
+  location: {
+    name?: string
+    lat: number
+    lon: number
+    source: 'coordinates' | 'geocoded'
+  }
+  tides: {
+    data: {
+      timezone: string
+      datum: 'MSL'
+      source: string
+      extrema: TideExtreme[]
+    }
+  }
+}
+
+interface MarineResponse {
+  timezone?: string
+  utc_offset_seconds?: number
+  hourly?: {
+    time?: string[]
+    sea_level_height_msl?: Array<number | null>
+  }
+}
+
+interface GeocodingResult {
+  name: string
+  latitude: number
+  longitude: number
+  country_code?: string
+  admin1?: string
+}
+
+async function fetchJson<T>(url: string): Promise<T> {
+  const controller = new AbortController()
+  const timeout = setTimeout(() => controller.abort(), FETCH_TIMEOUT_MS)
+  try {
+    const res = await fetch(url, { signal: controller.signal })
+    const data = await res.json()
+    if (!res.ok) {
+      const message =
+        typeof (data as { reason?: string })?.reason === 'string'
+          ? (data as { reason: string }).reason
+          : `Upstream HTTP ${res.status}`
+      throw new Error(message)
+    }
+    return data as T
+  } finally {
+    clearTimeout(timeout)
+  }
+}
+
+function localDateFromIso(iso: string, timeZone: string): string {
+  const date = new Date(iso)
+  if (Number.isNaN(date.getTime())) return ''
+  return new Intl.DateTimeFormat('en-CA', {
+    timeZone,
+    year: 'numeric',
+    month: '2-digit',
+    day: '2-digit'
+  }).format(date)
+}
+
+function interpolateExtremumTime(
+  t0: number,
+  y0: number,
+  t1: number,
+  y1: number,
+  t2: number,
+  y2: number
+): { timeOffsetHours: number; height: number } {
+  const denom = y0 - 2 * y1 + y2
+  if (Math.abs(denom) < 1e-6) {
+    return { timeOffsetHours: t1, height: y1 }
+  }
+  const offset = 0.5 * (y0 - y2) / denom
+  const clamped = Math.max(t0, Math.min(t2, offset))
+  const height = y1 + 0.25 * (y0 - y2) * (clamped - t1)
+  return { timeOffsetHours: clamped, height }
+}
+
+function localHourlyTimeToUtcIso(localIso: string, utcOffsetSeconds: number): string {
+  const [datePart, timePart] = localIso.split('T')
+  if (!datePart || !timePart) return localIso
+  const [year, month, day] = datePart.split('-').map(Number)
+  const [hour, minute] = timePart.split(':').map(Number)
+  if ([year, month, day, hour, minute].some((n) => Number.isNaN(n))) return localIso
+  const utcMs = Date.UTC(year, month - 1, day, hour, minute) - utcOffsetSeconds * 1000
+  return new Date(utcMs).toISOString()
+}
+
+function addFractionalHoursToLocalIso(localIso: string, deltaHours: number): string {
+  const [datePart, timePart] = localIso.split('T')
+  if (!datePart || !timePart) return localIso
+  const [year, month, day] = datePart.split('-').map(Number)
+  const [hour, minute] = timePart.split(':').map(Number)
+  if ([year, month, day, hour, minute].some((n) => Number.isNaN(n))) return localIso
+  const totalMinutes = hour * 60 + minute + Math.round(deltaHours * 60)
+  const dayOffset = Math.floor(totalMinutes / (24 * 60))
+  const minutesInDay = ((totalMinutes % (24 * 60)) + 24 * 60) % (24 * 60)
+  const nextDay = new Date(Date.UTC(year, month - 1, day + dayOffset))
+  const y = nextDay.getUTCFullYear()
+  const m = String(nextDay.getUTCMonth() + 1).padStart(2, '0')
+  const d = String(nextDay.getUTCDate()).padStart(2, '0')
+  const hh = String(Math.floor(minutesInDay / 60)).padStart(2, '0')
+  const mm = String(minutesInDay % 60).padStart(2, '0')
+  return `${y}-${m}-${d}T${hh}:${mm}`
+}
+
+export function findSeaLevelExtrema(
+  times: string[],
+  levels: Array<number | null>,
+  timeZone: string,
+  utcOffsetSeconds = 0
+): TideExtreme[] {
+  const extrema: TideExtreme[] = []
+  if (times.length < 3) return extrema
+
+  for (let i = 1; i < times.length - 1; i += 1) {
+    const prev = levels[i - 1]
+    const curr = levels[i]
+    const next = levels[i + 1]
+    if (prev == null || curr == null || next == null) continue
+
+    const isHigh = curr >= prev && curr >= next && (curr > prev || curr > next)
+    const isLow = curr <= prev && curr <= next && (curr < prev || curr < next)
+    if (!isHigh && !isLow) continue
+
+    const { timeOffsetHours, height } = interpolateExtremumTime(
+      i - 1,
+      prev,
+      i,
+      curr,
+      i + 1,
+      next
+    )
+    const localIso = addFractionalHoursToLocalIso(times[i], timeOffsetHours - i)
+    const iso = localHourlyTimeToUtcIso(localIso, utcOffsetSeconds)
+    extrema.push({
+      time: iso,
+      date: localDateFromIso(iso, timeZone),
+      height: Number(height.toFixed(2)),
+      isHigh
+    })
+  }
+
+  return extrema
+}
+
+export async function fetchTidesForCoordinates(
+  lat: number,
+  lon: number,
+  options?: { name?: string; source?: 'coordinates' | 'geocoded' }
+): Promise<TideLookupResult> {
+  const url = new URL(MARINE_API)
+  url.searchParams.set('latitude', String(lat))
+  url.searchParams.set('longitude', String(lon))
+  url.searchParams.set('hourly', 'sea_level_height_msl')
+  url.searchParams.set('timezone', 'auto')
+  url.searchParams.set('forecast_days', String(FORECAST_DAYS))
+
+  const data = await fetchJson<MarineResponse>(url.toString())
+  const times = data.hourly?.time ?? []
+  const levels = data.hourly?.sea_level_height_msl ?? []
+  const timezone = data.timezone || 'UTC'
+  const utcOffsetSeconds = data.utc_offset_seconds ?? 0
+
+  if (times.length === 0 || levels.length === 0) {
+    throw new Error('no_tide_data')
+  }
+
+  const extrema = findSeaLevelExtrema(times, levels, timezone, utcOffsetSeconds)
+  if (extrema.length === 0) {
+    throw new Error('no_tide_data')
+  }
+
+  return {
+    location: {
+      name: options?.name,
+      lat,
+      lon,
+      source: options?.source ?? 'coordinates'
+    },
+    tides: {
+      data: {
+        timezone,
+        datum: 'MSL',
+        source:
+          'Open-Meteo Marine (MeteoFrance SMOC, 0.08° grid) — model-derived, MSL not chart datum',
+        extrema
+      }
+    }
+  }
+}
+
+function scoreGeocodingResult(query: string, result: GeocodingResult): number {
+  const q = query.trim().toLowerCase()
+  const name = result.name.toLowerCase()
+  let score = 0
+  if (name === q) score += 100
+  if (name.startsWith(q) || q.startsWith(name)) score += 40
+  if (result.country_code === 'DE' || result.country_code === 'NO' || result.country_code === 'DK') {
+    score += 10
+  }
+  if (result.admin1?.toLowerCase().includes('niedersachsen') || result.admin1?.toLowerCase().includes('lower saxony')) {
+    score += 5
+  }
+  return score
+}
+
+export async function geocodePlace(query: string): Promise<GeocodingResult | null> {
+  const url = new URL(GEOCODING_API)
+  url.searchParams.set('name', query.trim())
+  url.searchParams.set('count', '10')
+  url.searchParams.set('language', 'de')
+
+  const data = await fetchJson<{ results?: GeocodingResult[] }>(url.toString())
+  const results = data.results ?? []
+  if (results.length === 0) return null
+
+  return [...results].sort((a, b) => scoreGeocodingResult(query, b) - scoreGeocodingResult(query, a))[0]
+}
+
+export async function fetchTidesForPlace(query: string): Promise<TideLookupResult> {
+  const place = await geocodePlace(query)
+  if (!place) {
+    const err = new Error('place_not_found') as Error & { status?: number }
+    err.status = 404
+    throw err
+  }
+
+  return fetchTidesForCoordinates(place.latitude, place.longitude, {
+    name: place.name,
+    source: 'geocoded'
+  })
+}