Pick a tool below and tap the canvas. Track drops waypoints into the active boat; Mark, Line (start/finish), Obstacle, Powerboat, Text and Arrow add the course and scenery. Drag the blue arrow to set the wind.
Boats & tracks
Wind
Rule demo
Who’s right?
No encounters detected — the boats stay clear of each other all the way round the loop. Draw two tracks that converge (and set their start sliders so they meet) to get a ruling.