Owner

openwatersio

15 indexed repositories · View on GitHub

neaps
A tide prediction engine

TypeScript · 36 stars
tide-database
A public database of tide harmonics

TypeScript · 25 stars
seascape
A map of the seafloor built from global open bathymetry.

Python · 14 stars
enc-tiles
Tools to produce vector tiles from Electronic Navigational Charts

TypeScript · 13 stars
OpenWaters
An experiment in building modern marine charts. Currently alpha and not to be use for navigation.

TypeScript · 13 stars
crowd-depth
Collect and share depth data from your marine vessel with crowd-sourced bathymetry programs.

TypeScript · 7 stars
aiscast
aiscast, the Open Waters AIS network: aisstream.io-compatible streams from open feeds and volunteer receivers

Go · 7 stars
seamap
A nautical-themed map with depths, seamarks, and hazards

TypeScript · 6 stars
signalk-tides
A SignalK plugin that provides tidal predictions for the vessel's position from various online sources.

TypeScript · 5 stars
slackwater-ios
offline tide & current predictions for iOS

Swift · 2 stars
station-metadata
Provider-neutral tide and current station identity, metadata, search aliases, and corrected positions

JavaScript · 1 star
slackwater-engine
Open, offline tide & current engine behind Slackwater — pure Swift harmonic prediction (MIT)

Swift · 0 stars
.github
Open Waters org profile & community health files

0 stars
slackwater.xyz
Landing page for Slackwater — offline tide and current predictions

TypeScript · 0 stars
openwaters.io
The website

Astro · 0 stars

Beginner friendly Everything

Open All

Online-gate paging tests fail on main in the offline lane Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

openwatersio/slackwater-ios#455 · Opened Sep 20, 2026
Updating to GESLA 4.1 Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

openwatersio/tide-database#146 · Opened Sep 20, 2026
List a solar eclipse the way a lunar one is listed Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

openwatersio/slackwater-ios#450 · Opened Sep 20, 2026
Nothing detects a missing App Group entitlement, and the guard that looks like it does cannot Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

openwatersio/slackwater-ios#444 · Opened Sep 20, 2026
Protect main with a ruleset — the reason it is unprotected no longer holds Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

openwatersio/slackwater-ios#442 · Opened Sep 20, 2026
Close the scrubber accessibility gaps so the App Store labels can say yes Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 55/100

openwatersio/slackwater-ios#438 · Opened Sep 20, 2026
signalk-aiscast if I try to add a generated token it is rejected and display of default token truncated Open

Difficulty 3/5 1-2 days Newbie friendliness 50/100

openwatersio/aiscast#82 · 1 comment · Opened Sep 19, 2026
Include current stations in the XTide TCD build Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

openwatersio/tide-database#142 · Opened Sep 18, 2026
Place stations by water body instead of hand-written corrections Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

openwatersio/tide-database#141 · Opened Sep 18, 2026
Answer track history questions from the MCP server Open

Difficulty 4/5 3-5 days Newbie friendliness 62/100

openwatersio/aiscast#80 · Opened Sep 18, 2026
Promote nightly builds to beta testers with one workflow, and prepare for the App Store Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

openwatersio/slackwater-ios#430 · Opened Sep 18, 2026
Why a station is unavailable is a provider's reason, not one reason for all of them Open

Difficulty 5/5 Over a week Newbie friendliness 38/100

openwatersio/slackwater-ios#428 · 1 comment · Opened Sep 17, 2026
Nothing checks that the widget's resource list covers the catalogs its sources load Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

openwatersio/slackwater-ios#426 · Opened Sep 17, 2026
An unavailable station is the one unmarked point on its own Nearby map Open

Difficulty 4/5 3-5 days Newbie friendliness 58/100

openwatersio/slackwater-ios#425 · Opened Sep 17, 2026
Thirteen stations are named by their four-letter IOC code, not by their place Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

openwatersio/station-metadata#45 · Opened Sep 17, 2026
Use UHSLC hourly data to improve station coverage and datums Open

Difficulty 5/5 Over a week Newbie friendliness 42/100

openwatersio/tide-database#138 · 1 comment · Opened Sep 17, 2026
Continue CHS station downloads in the background Open

openwatersio/slackwater-ios#421 · 1 assignee · Opened Sep 16, 2026
Help people replace unavailable stations Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 55/100

openwatersio/slackwater-ios#413 · Opened Sep 15, 2026
Remember which missing station someone wanted, and tell them when it arrives Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

openwatersio/slackwater-ios#402 · Opened Sep 15, 2026
The offline lane loses the tap that leaves a station detail Open

bug test

Difficulty 4/5 3-5 days Newbie friendliness 48/100

openwatersio/slackwater-ios#378 · 1 comment · Opened Sep 13, 2026
Show the next eclipse at every station, and offer it as a calendar download Open

Difficulty 5/5 Over a week Newbie friendliness 28/100

openwatersio/slackwater.xyz#88 · Opened Sep 12, 2026
A station has no coarse area key, only a name for its water Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

openwatersio/station-metadata#42 · Opened Sep 11, 2026
1,692 subordinate current stations have no page, because the site cannot predict them Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

openwatersio/slackwater.xyz#80 · Opened Sep 11, 2026
The accuracy receipts have nowhere to live Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 50/100

openwatersio/slackwater.xyz#75 · Opened Sep 11, 2026
High/low tide windows Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

openwatersio/slackwater-ios#352 · 1 comment · 1 reaction · Opened Sep 11, 2026
Automated releases cannot push to a branch protected by the standard ruleset Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

openwatersio/.github#13 · 4 comments · Opened Sep 8, 2026
First render waits for the full catalog decode and a 7,400-station distance sort Open

performance

Difficulty 4/5 3-5 days Newbie friendliness 52/100

openwatersio/slackwater-ios#317 · 1 comment · Opened Sep 8, 2026
Remote catalog refresh needs a schema gate so an older client never activates a catalog it cannot read correctly Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 38/100

openwatersio/slackwater-ios#303 · Opened Sep 7, 2026
Expose station name and heard-first count in /v1/stations Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 68/100

openwatersio/aiscast#53 · Opened Sep 6, 2026
Give the station page an OG image Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 52/100

openwatersio/aiscast#52 · Opened Sep 6, 2026
Let a station name itself Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

openwatersio/aiscast#51 · 1 reaction · Opened Sep 6, 2026
Add IOC Sea Level Station Monitoring Facility as a derived source (fit constituents from QC'd observations) Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

openwatersio/tide-database#124 · 2 comments · Opened Sep 5, 2026
Ship the database as a FlatBuffers file Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

openwatersio/tide-database#122 · 1 reaction · Opened Sep 5, 2026
Edge swipe on the station list can wedge navigation after leaving a detail Open

Difficulty 3/5 1-2 days Newbie friendliness 76/100

openwatersio/slackwater-ios#273 · Opened Sep 5, 2026
Add example use cases of the AIS API Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

openwatersio/openwaters.io#108 · 1 reaction · Opened Sep 2, 2026
Plausibility and corroboration gates key on transport, not evidence Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

openwatersio/aiscast#39 · 1 comment · Opened Sep 1, 2026
Relay DSC messages Open

Difficulty 5/5 Over a week Newbie friendliness 28/100

openwatersio/aiscast#34 · Opened Sep 1, 2026
Eleven tide pages read as tides but are mostly seasonal river stage Open

Difficulty 5/5 Over a week Newbie friendliness 28/100

openwatersio/slackwater.xyz#51 · Opened Sep 1, 2026
chs-arran-rapids stays excluded from the web corpus — decision, not an open question Open

Difficulty 1/5 Under an hour Newbie friendliness 30/100

openwatersio/slackwater.xyz#45 · Opened Sep 1, 2026
CHS page copy cannot say how the app predicts a gate, and that is load-bearing Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

openwatersio/slackwater.xyz#44 · 1 comment · Opened Sep 1, 2026
Contrast over the slack band is unmeasured — four marks now draw on 0.56 green Open

Difficulty 3/5 1-2 days Newbie friendliness 78/100

openwatersio/slackwater.xyz#41 · Opened Aug 31, 2026
Add history and track APIs Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

openwatersio/aiscast#32 · Opened Aug 31, 2026
Store normalized events as Parquet in R2 Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

openwatersio/aiscast#31 · Opened Aug 31, 2026
Show a coverage map across stations Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 38/100

openwatersio/aiscast#30 · 1 comment · Opened Aug 31, 2026
/currents/turn-point 404s: formerSlugs redirects were never built Open

low priority

Difficulty 3/5 1-2 days Newbie friendliness 74/100

openwatersio/slackwater.xyz#39 · 1 comment · Opened Aug 31, 2026
The tide browse index is 101 KB gzipped and grows with the corpus Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

openwatersio/slackwater.xyz#33 · 2 comments · Opened Aug 31, 2026
Worker bundle is at 62% of the size limit, and nothing checks it Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

openwatersio/slackwater.xyz#32 · Opened Aug 31, 2026
Prerender performance is unmeasured, so a regression reaches production as workerd flakiness Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

openwatersio/slackwater.xyz#30 · 1 comment · Opened Aug 31, 2026
Tide OG cards collide the peak label with the station name Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

openwatersio/slackwater.xyz#26 · Opened Aug 31, 2026
Former-slug redirects before the first slug rename Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

openwatersio/slackwater.xyz#19 · Opened Aug 31, 2026

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