GO / NO-GO reads the marine forecast for your exact boat, crew and plan — then gives you one clear verdict before you leave the dock. No more squinting at a wall of numbers.
Privacy-first — your boat profile never leaves your phone.
13 knots is a lazy afternoon in a cabin cruiser and a rough ride in a PWC. A 0.4 m swell at a 4-second period is steeper and nastier than the height alone suggests.
GO / NO-GO does the judgement for you. It weighs every factor against the limits of your boat, crew and plan — and the worst factor always decides.
Set it up once. Get a straight answer every time you think about going out.
Pick your hull — RIB, bowrider, cabin cruiser, PWC, power cat, sailboat or sailing cat — and set your comfort limits. Stored on your device, never uploaded.
Open the app and see GO, THINK TWICE or NO-GO for right now — plus a colour bar for every hour of your day on the water.
Tap any hour for the reason in plain English — not just raw stats. Know exactly why it's amber before you commit.
Every hour's forecast is judged against limits set by your boat, crew and plan. The worst factor decides — no guesswork.
A colour bar from dawn to dusk shows the safe windows at a glance. Tap any hour for the full breakdown.
Planning a trip? See morning and afternoon verdicts for the next 10 days and the single best window for your setup.
Plain-English explanations translate wind, gusts, wave height and period into what they'll actually feel like on the helm.
From a nimble PWC to a heavy sailing cat, thresholds are tuned to how your class of boat actually handles the sea.
Keep your shore contact, emergency numbers and marina slip in one place — ready to hand over if it's ever needed.
No accounts, no tracking, no data sold. Your boat profile lives on your device only. Location is used purely to fetch the forecast.
Knots and feet or km/h and metres — switch to whatever you think in. Sunrise, sunset and your distance from the marina, built in.
Verdicts are local to where you actually launch, with your home marina and distance-from-shore front and centre.
Your verdict & hourly bar
10-day outlook & best window
Every metric, explained
Tuned to your setup
Forecasts come from independent, professional-grade providers — Copernicus Marine Service and Open-Meteo — the same sources trusted across the maritime world.
GO / NO-GO turns that data into a decision, but it never pretends to be more than it is: a decision-support tool for recreational boaters.
Conditions guidance only. Marine forecasts are probabilistic and the sea changes faster than any model can predict. No verdict is permission to launch. The skipper's judgement is always final — and always sole.
We're putting the finishing touches on the public launch. Drop your email and we'll send you the download link the day it goes live.
No. It's a decision-support tool that reads marine forecasts for your boat and gives you a clear verdict. It's not a navigation system, not a certified safety service, and never a substitute for proper seamanship and local knowledge.
Each hour's wind, gusts, wave height, wave period and visibility are compared against limits set by your boat type, crew and plan. Whichever factor is worst sets the verdict for that hour — so a calm sea with vicious gusts still reads amber or red.
From independent, professional providers — Copernicus Marine Service and Open-Meteo. GO / NO-GO doesn't modify the data; it interprets it for your specific setup.
Your boat profile is stored locally on your device and never sent to any server. There are no accounts and no tracking. Your location is used only to fetch the local forecast and work out your distance from your home marina.
Seven profiles: RIB, bowrider, cabin cruiser, PWC, power catamaran, sailboat and sailing catamaran — each with thresholds tuned to how that class handles real sea states.
GO / NO-GO is in final testing and launching on Google Play very soon. Join the launch list above and you'll be the first to know.
