Know the leg before you sail it. Know why after.

Before: per-leg apparent-wind prediction

Pick the course, give the app your boat's polars, and Race Marks predicts the apparent-wind angle you can expect on every leg — and keeps updating it as live wind observations shift.

You pick the right sail and the right side of the course before the gun, not halfway up the first beat.

During: the numbers, where you can read them

Live bearing and distance with auto-advance, a next-mark preview so the crew is set up early, and an iPad cockpit layout that splits the course diagram and the distance-to-mark at a size you can read from the rail.

Build a platonic or practice course from known marks when you're training rather than racing.

Laylines, next-leg point of sail and audio/haptic prompts are the Tactician tier — in beta, not yet released. Status table below.

After: the race analysis report

Race Marks reads your GPS track and onboard instruments and turns them into a tactical picture of how the race actually went:

• Wind, calculated vs instruments — derived from your track and boat speed, laid against what your instruments captured. A straight calibration check.
• Tide set & drift — where you pointed versus where you actually went, leg by leg.
• TWA vs the observed weather — how well you held your lane across the race, not an average that hides the story.
• Per boat and across the fleet — your own sessions, plus a race-director view over the whole fleet.

Analysis reports are in beta for Race Marks Pro Navigator members. More on reports →