Updates

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…

feat: offer a tide widget to chart plotters

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

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

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

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

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

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…

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