Updates

Almanac 0.11.0 adds Earth perihelion and aphelion events in TypeScript, Swift, and Kotlin.

The style for the v2026.10.16 tiles.

Shallow seas no longer turn into one solid blue band at low zoom, and Bands mode is a compiled chart partition from z4 up.

More accurate soundings, and none lost or sent twice.

Depth areas and isobaths are now compiled per zoom tier, the way an ENC is compiled per usage band, and the soundings follow chart practice for selection and rounding.

Welcome to the first release of Slackwater, the tides & currents app that works offline where you need it — on the water, at the beach, in the anchorage. View past, present, and future predictions at…

Almanac 0.10.0 uses Swift 6 language mode and requires a Swift 6 or newer toolchain.

Almanac 0.9.0 provides an instantaneous sunrise-based day/night decision in TypeScript, Swift, and Kotlin.

Almanac 0.8.0 adds Uranus and Neptune, the Sun and Moon events apps need to move off SunCalc, and migration guides for SunCalc and Solar, in TypeScript and Swift.

Almanac 0.7.0 provides apparent horizon dip and native planetary motion in TypeScript and Swift, with Earth included for solar-system views.

feat: offer a tide widget to chart plotters

Maritime zone tiles for @openwaters/maritime-zones 0.2.0. The package downloads the tiles it needs from this release and checks each against the sha256 in tiles.json.

Your station on aiscast takes your boat's name, the vessel name set in Signal K, while Share my own ship is on. Turning that switch off removes the name, so the station never says where the boat is.…

Maritime zone tiles for @openwaters/maritime-zones 0.1.0. The package downloads the tiles it needs from this release and checks each against the sha256 in tiles.json.

Almanac 0.6.0 reports where greatest eclipse falls for every solar eclipse on Earth, including partial eclipses, in TypeScript and Swift.

Almanac 0.5.0 adds solar eclipses anywhere on Earth, and the central line of each total or annular eclipse, in TypeScript and Swift.

Publish the Alaska panhandle's NOAA gauges in Alaska

Let Swift apps depend on the tide database by URL

Stop loading baltic-sea.geo.json as a phantom station

New Receive setting, on by default: Send aiscast traffic to NMEA 0183 output. Targets injected from aiscast are re-emitted as !AIVDM on the nmea0183out event, so chartplotters and tablet apps reading…

The offline queue writes far less to the SD card. Each queue file used to be rewritten from scratch every fifteen seconds as sentences were added to it, so a boat at anchor hearing a slow trickle of…

Almanac 0.3.0 adds the altitude and azimuth of any fixed star in TypeScript and Swift.

Almanac 0.1.0 is the first release: offline Sun and Moon astronomy for TypeScript and Swift, with one behavior in both ports and no network access or runtime data files.

Almanac 0.4.0 adds solar eclipses for an observer in TypeScript and Swift.

Find nearby places from any detail page, and see how the Moon can shape the tides.

Finding the right station, a timeline that doesn't end, and sharing the moment you're looking at.

Synthesize LAT and HAT where NOAA publishes neither

Almanac 0.2.0 adds backward and range lunar eclipse searches in TypeScript and Swift.

Buddy boats: vessels on signalk-buddylist-plugin's list are followed on aiscast wherever they are, far beyond VHF range, in every receive mode. The buddylist plugin keeps raising its buddy flag and p…

ci: cache GeoNames data to avoid re-downloading in tests

New Share setting: Fallback to self-reported AIS position. When an AIS transponder is not available, the plugin builds class B position and static reports from Signal K (like @signalk/aisreporter) an…

Unknown-depth water no longer shows gaps at tile seams or along shorelines, and the depth-area geometry underneath is now valid by construction.

Warm the land color for better contrast with the water

Six new high-resolution bathymetry sources across four countries, restored drying-area rendering on macro-tidal coasts, and a hardened data pipeline behind them.

Try it: demo viewer · openwaters.io/charts/seascape

Draw many more of the features already in the map data

Try it: demo viewer · openwaters.io/charts/seascape

Drop the CommonJS builds; all neaps packages are now ESM-only. The CJS entries can't survive their dependencies going ESM-only, since they load them with require(). CommonJS consumers on Node 20.19+…

Require matching offsets to merge subordinate stations

fitTideStation: fetch a reference tide port's wlp, decimate to 15 min, fit the standard harmonic basis → a tide-harmonic record (no flood/ebb axis).

Per-country chart datums (LLWLT/NLLW/ALLW/TLT/MLWS) + Baltic split

Try it: demo viewer · openwaters.io/charts/seascape

Re-reference RWS harmonic phases to UTC (DST fix)

Use ISO 8601 for report timestamps in plugin status

Bump @neaps/react to 0.1.1 for responsive TideStation fixes

<TideStation> no longer collapses into the tabbed layout based on width alone. Narrow content-sized containers (like phones in portrait) now keep the stacked continuous-scroll view; tabs only appear…

First public release of Seascape: free bathymetry tiles for MapLibre and Mapbox GL, built from 23 global and regional sources.

Depth history recording works again with signalk-to-influxdb2 v2. Reading position and depth back from the history provider broke against the v2 provider. crowd-depth now runs a single combined query…

I'm excited to share a major update to the Signal K Tides plugin, which has been completely rebuilt around neaps for fully offline global tide predictions…no network dependency, no API keys.

Derive TICON datums from GESLA-4 water levels

Moved useStation into @neaps/tide-predictor so it can be used without the heavy dependency of @neaps/tide-database.

Add datums and harmonic constituents to subordinate stations

Add bbox query parameter to GET /stations for filtering stations by bounding box. Pass a comma-separated string minLon,minLat,maxLon,maxLat to return only stations within that geographic area.

Remove TICON stations that duplicate latest NOAA stations

Created initial neaps CLI

Add support for timeline predictions with offsets.

Add configurable route prefix support to createApp().

Remove stations with tidal range < 2cm

Upload build artifacts

[TICON] Prefer open data, mark non-commercial stations

Build xtide TCD harmonics file by @bkeepers in https://github.com/openwatersio/tide-database/pull/48, https://github.com/openwatersio/tide-database/pull/50

Speed up extremes detection by ~100x, deprecate timeFidelity option on getExtremesPrediction, which will always be &lt;1s now.

Replace constituent definitions with the IHO TWCWG (International Hydrographic Organization Tidal and Water Level Working Group) constituent list.

Add text search

Update tests for tide-database internal id change

Remove noaa stations from ticon data

Prettier

Add constituents to support TICON data

Add GitHub Action to lint/build

Benchmark improvements

Only use UTC phase, remove local phase

Migrate to tsdown for bundling

Convert tools to TypeScript, extract helpers

Introduce new package that bundles @neaps/tide-predictor and @neaps/tide-database into an easier to use pre-configured tide prediction engine.

Fix typos in docs and data

Cache last known position for use when navigation.position not available

Calculate and set environment.tide.heightNow

Add StormGlass.io as a source in https://github.com/bkeepers/signalk-tides/pull/1

Removing Babel