Based on the DP-N for the class being sailed and the wind velocity, these calculators will produce a chart of estimated times for the course selected based d on the length of the first windward leg (Start to Mark 1). Scroll down to find a time near your target to find the length for your first leg.
Don’t know the class’ DP-N number?
CLICK HERE
to view the US Portsmouth tables for pre-calculated classes
Windward/Leeward Courses:
WIndward/Leeward - Mid-Course Line
2-leg, 4-leg, or 6-leg Windward/Leeward with S/F line below the course
(with or without offset & gate)
Start Line is calculated at 0.05 NM below Mark 2P/2S
2-leg (1 “lap”), 4-leg (2 “laps”), or 6-leg (3 “Laps”) Windward/Leeward
(with or without offset & gate)
Windward/Leeward
Start Below - Finish Above
3-leg, or 5-leg Windward/Leeward with Starting line below the course and Finishing line above
(with or without offset & gate)
Start Line is calculated at 0.05 NM below Mark 2P/2S
Finish Line is calculated at 0.05 NM above Mark 1