Polar plot showing boat speed over water (in knots) for various true wind speeds and angles from true wind direction
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Table of values for boat speed over water (in knots, to two decimal places) for various true wind speeds and angles from true wind direction
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5 kt |
10 kt |
15 kt |
20 kt |
25 kt |
30 kt |
35 kt |
30° |
6.35 |
9.91 |
10.53 |
11.45 |
11.85 |
11.91 |
11.90 |
40° |
9.58 |
14.71 |
15.70 |
17.25 |
18.03 |
18.16 |
18.11 |
50° |
11.12 |
15.71 |
17.20 |
19.02 |
19.98 |
20.31 |
20.38 |
60° |
12.31 |
16.73 |
18.43 |
20.51 |
21.78 |
22.66 |
22.92 |
70° |
12.98 |
17.57 |
19.50 |
22.25 |
24.28 |
25.66 |
26.24 |
80° |
13.63 |
19.23 |
21.51 |
24.85 |
27.48 |
29.31 |
29.83 |
90° |
13.70 |
19.78 |
22.54 |
26.83 |
30.37 |
32.39 |
32.89 |
100° |
13.23 |
19.71 |
23.88 |
28.60 |
32.05 |
33.25 |
33.33 |
110° |
12.63 |
20.04 |
24.47 |
29.05 |
32.46 |
34.32 |
34.81 |
120° |
12.31 |
19.83 |
24.43 |
29.28 |
33.17 |
35.95 |
36.74 |
130° |
11.23 |
18.96 |
24.57 |
29.68 |
33.78 |
37.06 |
38.05 |
140° |
9.64 |
17.23 |
23.24 |
29.11 |
34.09 |
37.62 |
39.10 |
150° |
7.83 |
14.67 |
19.88 |
26.20 |
32.70 |
39.04 |
40.85 |
160° |
6.30 |
12.31 |
17.51 |
22.63 |
27.97 |
34.33 |
36.65 |
170° |
5.65 |
10.84 |
14.72 |
18.83 |
23.16 |
28.37 |
30.35 |
180° |
4.87 |
9.29 |
12.87 |
16.54 |
20.41 |
25.07 |
26.50 |
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