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Extend LocationService's source-selection policy with a quality-aware
"marginal staleness" zone between the primary and a new extended
staleness threshold (default 10 s):
1. Fresh NMEA (≤ primary threshold, 5 s) → always prefer NMEA
2. Marginally stale NMEA (5–10 s) → prefer NMEA only when
GpsPosition.accuracyMeters is strictly better than Android's;
fall back to Android conservatively when accuracy data is absent
3. Very stale NMEA (> 10 s) → always prefer Android
4. Only one source available → use it regardless of age
Changes:
- GpsPosition: add nullable accuracyMeters field (default null, no
breaking change to existing callers)
- LocationService: add nmeaExtendedThresholdMs constructor parameter;
recomputeBestPosition() now implements three-tier logic; extract
GpsPosition.hasStrictlyBetterAccuracyThan() helper
- LocationServiceTest: expose nmeaExtendedThresholdMs in fusionService
helper; add posWithAccuracy helper; add 4 new test cases covering
accuracy-based NMEA preference, worse-accuracy fallback, no-accuracy
conservative fallback, and very-stale unconditional fallback
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Adds priority-based selection between NMEA GPS (dedicated marine GPS,
higher priority) and Android system GPS (fallback) within LocationService.
Selection policy:
1. Prefer NMEA when its most recent fix is fresh (≤ nmeaStalenessThresholdMs, default 5 s)
2. Fall back to Android GPS when NMEA is stale
3. Use stale NMEA only when Android has never reported a fix
4. bestPosition is null until at least one source reports
New public API:
- GpsSource enum (NONE, NMEA, ANDROID)
- LocationService.updateNmeaGps(GpsPosition)
- LocationService.updateAndroidGps(GpsPosition)
- LocationService.bestPosition: StateFlow<GpsPosition?>
- LocationService.activeGpsSource: StateFlow<GpsSource>
- Injectable clockMs parameter for deterministic unit tests
Adds 7 unit tests covering: no-data state, fresh NMEA priority,
stale NMEA fallback, only-NMEA/only-Android scenarios, exact-threshold
edge case, and NMEA recovery after Android takeover.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Per COMPONENT_DESIGN.md Section 4.6, the MOB navigation view must display
wind and current conditions at the time of the event.
- MobEvent: add nullable windSpeedKt, windDirectionDeg, currentSpeedKt,
currentDirectionDeg fields captured at the exact moment of activation
- MobAlarmManager.activate(): accept optional wind/current params and
forward them into MobEvent (defaults to null for backward compatibility)
- LocationService (new): aggregates live SensorData (resolves true wind via
TrueWindCalculator) and marine-forecast current conditions; snapshot()
provides a point-in-time EnvironmentalSnapshot for safety-critical logging
- MobAlarmManagerTest: add tests for wind/current storage and null defaults
- LocationServiceTest (new): covers snapshot, true-wind resolution,
current-condition updates, and the latestSensor flow
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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- Add AnchorWatchState with calculateRecommendedWatchCircleRadius, which
uses ScopeCalculator.watchCircleRadius (Pythagorean scope formula) and
falls back to rode length when geometry is invalid
- Add AnchorWatchHandler Fragment with EditText inputs for Depth (m) and
Rode Out (m); updates suggested watch circle radius live via TextWatcher
- Add fragment_anchor_watch.xml layout
- Wire AnchorWatchHandler into bottom navigation (MainActivity + menu)
- Add AnchorWatchStateTest covering valid geometry, short-rode fallback
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Implements weather data download over Iridium satellite links:
- GribParameter enum with SATELLITE_MINIMAL set (wind + pressure only)
- SatelliteDownloadRequest data class (region, params, forecast hours, resolution)
- SatelliteGribDownloader: size/time estimation, abort-on-oversized, pluggable fetcher
- 8 unit tests covering estimation scaling, minimal param set, and download outcomes
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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- Add GribRegion, GribFile data models and GribFileManager interface
- Add InMemoryGribFileManager for testing and default use
- Add GribStalenessChecker with FreshnessResult sealed class (Fresh/Stale/NoData)
- Integrate weatherStaleness StateFlow into MainViewModel (checked after loadWeather)
- Add yellow staleness banner TextView to fragment_map.xml
- Wire staleness banner in MapFragment (shown on Stale, hidden on Fresh/NoData)
- Add GribStalenessCheckerTest (4 TDD tests)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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- LogbookEntry data class: timestampMs, lat/lon, SOG, COG, wind, baro, depth, event/notes
- LogbookFormatter: UTC time, position (deg/dec-min), 16-pt compass, row/page builders
- LogbookPdfExporter: landscape A4 PDF via android.graphics.pdf.PdfDocument with column headers,
alternating row shading, and table border
- 20 unit tests covering all formatting helpers and data model behaviour
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Implement offline harmonic tide prediction as specified in COMPONENT_DESIGN.md:
- TideConstituent: name, speedDegPerHour, amplitudeMeters, phaseDeg
- TidePrediction: timestampMs, heightMeters
- TideStation: id, name, lat, lon, datumOffsetMeters, constituents
- HarmonicTideCalculator: predictHeight(), predictRange(), findHighLow()
Formula: h(t) = Z0 + Σ [ Hi × cos( ωi × (t − t0) − φi ) ]
- 15 unit tests covering all calculation paths
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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- GpsPosition: latitude, longitude, sog (knots), cog (degrees true), timestampMs
- NmeaParser.parseRmc: handles GP/GN talker IDs, void status, malformed input
- SOG/COG default to 0.0 when fields absent; S/W coords are negative
- 13 unit tests: GpsPositionTest (2), NmeaParserTest (11) — all GREEN
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Package declarations were already org.terst.nav.* but files lived under
com/example/androidapp/. Kotlin 2.0 (K2) compiler on CI fails when
package declarations don't match directory structure during kapt stub
generation. Moved all 20 files to their correct locations and renamed
MainActivity (weather) -> WeatherActivity to avoid confusion with the
nav app's MainActivity.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Extract location permission decision logic from MainActivity into a
testable LocationPermissionHandler class. Covers: permission already
granted, needs request, fine-only granted, coarse-only granted, both
granted, both denied, and never-ask-again (empty grants) scenarios.
All permissions (INTERNET, ACCESS_FINE_LOCATION, ACCESS_COARSE_LOCATION)
were already declared in AndroidManifest.xml; no manifest changes needed.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Implements the wind/current map overlay and 7-day weather forecast
display that loads on application launch:
Data layer:
- Open-Meteo API (free, no key): WeatherApiService + MarineApiService
- Moshi-annotated response models (WeatherResponse, MarineResponse)
- WeatherRepository: parallel async fetch, Result<T> error propagation
- Domain models: WindArrow (with beaufortScale/isCalm) + ForecastItem
(with weatherDescription/isRainy via WMO weather codes)
Presentation layer:
- MainViewModel: StateFlow<UiState> (Loading/Success/Error),
windArrow and forecast streams
- MainActivity: runtime location permission, FusedLocationProvider
GPS fetch on startup, falls back to SF Bay default
- MapFragment: MapLibre GL map with wind-arrow SymbolLayer;
icon rotated by wind direction, size scaled by speed in knots
- ForecastFragment + ForecastAdapter: RecyclerView ListAdapter
showing 7-day hourly forecast (time, description, wind, temp, precip)
Resources:
- ic_wind_arrow.xml vector drawable (north-pointing, rotated by MapLibre)
- BottomNavigationView: Map / Forecast tabs
- ViewBinding enabled throughout
Tests (TDD — written before implementation):
- WindArrowTest: calm detection, direction normalisation, Beaufort scale
- ForecastItemTest: weatherDescription, isRainy for WMO codes
- WeatherApiServiceTest: MockWebServer request params + response parsing
- WeatherRepositoryTest: MockK service mocks, data mapping, error paths
- MainViewModelTest: Turbine StateFlow assertions for all state transitions
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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