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° |
2.07 |
4.79 |
8.14 |
9.28 |
9.52 |
9.68 |
9.85 |
| 40° |
7.39 |
12.71 |
14.73 |
14.77 |
13.79 |
14.03 |
14.27 |
| 50° |
8.99 |
14.52 |
15.83 |
16.37 |
16.03 |
16.28 |
16.56 |
| 60° |
9.66 |
15.31 |
16.86 |
17.56 |
17.31 |
17.59 |
17.89 |
| 70° |
10.20 |
16.29 |
18.29 |
19.21 |
19.05 |
19.37 |
19.70 |
| 80° |
10.52 |
17.01 |
19.35 |
20.48 |
20.43 |
20.77 |
21.13 |
| 90° |
10.63 |
17.47 |
20.06 |
21.38 |
21.45 |
21.81 |
22.17 |
| 100° |
10.38 |
17.24 |
20.47 |
21.81 |
21.76 |
22.12 |
22.49 |
| 110° |
10.12 |
17.01 |
20.88 |
22.24 |
22.07 |
22.43 |
22.81 |
| 120° |
9.85 |
16.89 |
20.84 |
22.58 |
22.81 |
23.18 |
23.57 |
| 130° |
9.13 |
16.01 |
20.37 |
22.31 |
22.69 |
23.06 |
23.44 |
| 140° |
8.24 |
14.75 |
19.18 |
21.33 |
21.98 |
22.34 |
22.72 |
| 150° |
7.18 |
13.12 |
17.28 |
19.61 |
20.60 |
20.93 |
21.29 |
| 160° |
5.67 |
10.89 |
14.94 |
17.33 |
18.56 |
19.19 |
19.60 |
| 170° |
4.97 |
9.53 |
13.07 |
15.37 |
16.70 |
17.26 |
17.71 |
| 180° |
4.60 |
8.65 |
11.80 |
13.91 |
15.23 |
16.03 |
16.52 |
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