course2steer, a tidal passage-planning tool

Field notes

The described workflow starts with a GPX route and four sailing inputs: departure time, speed through the water, leeway, and magnetic variation. course2steer then selects tide samples for the route and projected passage window, compares Standard and CrossTide methods, and produces course-to-steer, estimated positions, and timing. The page says sailors can revise conditions underway and recalculate offline. Its data layer names Copernicus Marine Service, UKHO Admiralty, NOAA, and Canada IWLS.