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| J/37 Optimum boat speed for true wind speed | |||||||
| True Wind Speed | Point of Sail | Angle Off True Wind | Target Boat Speed (knots) | Apparent Wind Speed | Apparent Wind Angle | ||
| 6 kts | Optimum Beat | 45° | 5.15 | 10.10 | 24° | ||
| 60° | 60° | 6.11 | 10.30 | 29° | |||
| 90° | 90° | 6.42 | 8.65 | 42° | |||
| 120° | 120° | 4.75 | 5.36 | 70° | |||
| Optimum Run - Spinnaker | 140° | 4.75 | 3.82 | 88° | |||
| Optimum Run - Jib | 169° | 2.95 | 2.68 | 158° | |||
| Optimum Run - Jib with pole | 172° | 3.19 | 3.82 | 164° | |||
| 8 kts | Optimum Beat | 43° | 5.92 | 12.63 | 24° | ||
| 60° | 60° | 6.90 | 12.54 | 31° | |||
| 90° | 90° | 7.17 | 10.52 | 47° | |||
| 120° | 120° | 5.85 | 6.99 | 74° | |||
| Optimum Run - Spinnaker | 143° | 5.80 | 4.80 | 97° | |||
| Optimum Run - Jib | 169° | 3.92 | 3.98 | 158° | |||
| Optimum Run - Jib with pole | 173° | 4.23 | 3.60 | 164° | |||
| 10 kts | Optimum Beat | 40° | 6.25 | 14.82 | 24° | ||
| 60° | 60° | 7.24 | 14.33 | 32° | |||
| 90° | 90° | 7.60 | 12.18 | 52° | |||
| 120° | 120° | 6.60 | 8.56 | 74° | |||
| Optimum Run - Spinnaker | 150° | 6.36 | 5.50 | 114° | |||
| Optimum Run - Jib | 169° | 4.83 | 5.02 | 159° | |||
| Optimum Run - Jib with pole | 172° | 5.21 | 4.57 | 164° | |||
| 12 kts | Optimum Beat | 39° | 6.44 | 16.84 | 24° | ||
| 60° | 60° | 7.43 | 16.06 | 35° | |||
| 90° | 90° | 7.91 | 13.74 | 55° | |||
| 120° | 120° | 7.06 | 10.13 | 83° | |||
| Optimum Run - Spinnaker | 163° | 6.53 | 6.01 | 144° | |||
| Optimum Run - Jib | 170° | 5.68 | 6.12 | 160° | |||
| Optimum Run - Jib with pole | 172° | 6.12 | 5.62 | 165° | |||
| 14 kts | Optimum Beat | 38° | 6.54 | 18.87 | 25° | ||
| 60° | 60° | 7.55 | 17.74 | 37° | |||
| 90° | 90° | 8.17 | 15.18 | 57° | |||
| 120° | 120° | 7.40 | 11.74 | 87° | |||
| Optimum Run - Spinnaker | 169° | 7.00 | 7.17 | 158° | |||
| Optimum Run - Jib | 170° | 6.42 | 7.30 | 162° | |||
| Optimum Run - Jib with pole | 173° | 6.84 | 6.83 | 166° | |||
| 16 kts | Optimum Beat | 38° | 6.60 | 20.65 | 25° | ||
| 60° | 60° | 7.63 | 19.35 | 38° | |||
| 90° | 90° | 8.36 | 16.44 | 59° | |||
| 120° | 120° | 7.70 | 13.38 | 90° | |||
| Optimum Run - Spinnaker | 172° | 7.43 | 8.60 | 165° | |||
| Optimum Run - Jib | 172° | 6.96 | 8.64 | 166° | |||
| Optimum Run - Jib with pole | 172° | 7.35 | 8.25 | 167° | |||
| 20 kts | Optimum Beat | 38° | 6.67 | 24.15 | 26° | ||
| 60° | 60° | 7.74 | 22.50 | 41° | |||
| 90° | 90° | 8.58 | 19.01 | 63° | |||
| 120° | 120° | 8.23 | 16.63 | 95° | |||
| Optimum Run - Spinnaker | 173° | 8.22 | 11.75 | 169° | |||
| Optimum Run - Jib | 173° | 7.74 | 11.72 | 169° | |||
| Optimum Run - Jib with pole | 173° | 8.17 | 11.37 | 168° | |||