The onboard app for people who go to sea.

Nautical charts, weather, routes and instruments on one screen, made to be read in full sun with one hand on the helm.

• ChartsNautical map with bathymetry, seamarks and regulated zones, downloadable for sailing without a signal.
• WeatherWind, gusts, pressure, waves and currents from the ECMWF and GFS models, hour by hour up to six days ahead.
• RoutesRoute planning that respects depths and restricted areas, with timing and weather along the way.
• InstrumentsHeading, speed and depth from the phone's GPS, with your boat and range rings on the map.
• ReportsCommunity notices nearby: moorings, hazards, sea conditions.

Knotly is in private beta on Android. The iPhone version comes later.