Tidelync reads the marine forecast at every point of your route at the time you'll actually be there, grades it for your boat, works out fuel and ETA, and tells someone ashore if you're overdue. Phone or tablet. No chartplotter, no app store.
Every boat that got into trouble last year left the dock with a weather forecast available. What the skipper didn't have was a tool that applied it to that boat, that route, that hour — or anyone ashore who knew the moment the boat stopped making progress.
The route is sampled every few miles and the forecast is read at the time you'll be at each point — wind, gusts, seas, steepness, fog. The planner scans 48 hours of departures and picks the best window. Multi-day trips get overnight stops and weather holds.
Enter your boat (or pick a model close to it) and one fuel-flow reading you trust. Tidelync builds the speed curve from idle to wide-open throttle, drops you off plane when the seas say so, and tells you whether the round trip fits with a third in reserve.
Live tracking from your phone, one-tap check-ins, and a help message with your last fix, course, speed, next waypoint, ETA and a link to your track. If you're 30 minutes past a waypoint and not there, it fires. A person calls the Coast Guard; the app never does.
Also on the map: wind field, water-temperature contours, NAVAREA and Coast Guard warnings, NOAA limit lines, buoys and lights, live AIS traffic, every marina in OpenStreetMap plus hand-verified contacts with phone and VHF, boat-in campsites and ramps on the lakes, the Great Loop as 88 stops. Import a route from your chartplotter (GPX / KML), export one back.
Choose a preset, build one on the chart, or import from Navionics, Garmin or OpenCPN.
Pick a model to start from, correct cruise speed and one known burn. Saved on your device.
GO, CAUTION or NO-GO per point, best departure window, fuel, ETA, water temp, wind.
Add a shore contact. Check in with one tap; Send for help carries everything they need.
The planner is free and stays free. The safety layer ships after it has been proven on real passages — on the founder's 28-foot Regal, trailered from Arizona to the Pacific — before anyone pays for it.
Route grading, departure windows, fuel and ETA, water temp, marinas, warnings, AIS, GPX import. Free, no account. Use it, break it, tell us what's wrong.
Fuel model calibrated against the engine's own fuel-flow display; grades checked against what the sea actually did; check-in and help messages delivered at the edge of cellular coverage. Beta testers on the Southern California coast invited to run the same passage.
Mexican marina data, no-signal operation over Starlink and satellite messaging, the shared-track link read by a contact back in the US. Accounts and live tracking open to beta testers.
San Diego to Santa Barbara by way of Catalina and the islands: multi-day planning with weather holds, overdue detection on long legs, photos on the track, a family crew using the app. Float plan with automatic escalation goes live for beta testers.
Live sharing, float plan with overdue escalation to your shore contact, crowd-sourced hazard reports, pushed warnings. Beta testers who helped keep it free for a year.
Tell us where you boat and what you run. We'll send the trial-passage dates for your coast, and nothing else.
No spam, no selling your email. Unsubscribe is one reply.
We're not charging for a float plan that hasn't been proven on our own boat. Beta testers who help us run the trials get the safety layer free for a year when it launches.