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° |
1.55 |
3.52 |
5.93 |
6.63 |
6.66 |
6.78 |
6.93 |
| 40° |
6.00 |
10.08 |
12.04 |
12.53 |
12.18 |
12.37 |
12.65 |
| 50° |
7.05 |
11.98 |
13.51 |
14.24 |
14.15 |
14.40 |
14.72 |
| 60° |
7.57 |
12.63 |
14.46 |
15.37 |
15.38 |
15.62 |
15.97 |
| 70° |
7.92 |
13.34 |
15.79 |
16.82 |
16.79 |
17.09 |
17.47 |
| 80° |
8.23 |
13.99 |
16.92 |
18.00 |
17.88 |
18.16 |
18.55 |
| 90° |
8.51 |
14.60 |
17.83 |
18.88 |
18.62 |
18.91 |
19.32 |
| 100° |
8.45 |
14.58 |
18.10 |
19.54 |
19.64 |
19.96 |
20.41 |
| 110° |
8.38 |
14.57 |
18.37 |
20.21 |
20.69 |
21.03 |
21.49 |
| 120° |
7.97 |
14.01 |
18.57 |
20.58 |
21.07 |
21.40 |
21.88 |
| 130° |
7.08 |
12.78 |
17.16 |
19.81 |
21.09 |
21.43 |
21.91 |
| 140° |
6.22 |
11.43 |
15.48 |
18.29 |
19.88 |
20.21 |
20.66 |
| 150° |
5.42 |
9.96 |
13.53 |
15.99 |
17.36 |
17.65 |
18.05 |
| 160° |
4.61 |
8.89 |
12.07 |
14.25 |
15.48 |
15.74 |
16.10 |
| 170° |
4.33 |
8.45 |
11.49 |
13.51 |
14.63 |
14.87 |
15.19 |
| 180° |
4.21 |
8.28 |
11.26 |
13.21 |
14.27 |
14.50 |
14.82 |
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