SINILIND
EST ROCK 20Sail number EST/EST309
GPH
823.2
OSN
795.9
LOA
7.306 m
Displacement
1689 kg
Triple-Number Ratings
Lower is fasterTriple Inshore
Low
0.4816
Medium
0.6677
High
0.7759
Triple Offshore
Low
0.6243
Medium
0.829
High
0.9362
Boat Specifications
Dimensions
- Length overall
- 7.306 m
- Beam
- 2.25 m
- Draft
- 1.09 m
- Displacement
- 1689 kg
- Crew weight
- 330 kg
- Wetted surface
- 13.03 m²
Sails
- Mainsail
- 11.31 m²
- Genoa
- 15.17 m²
- Spinnaker
- 33.21 m²
- Asymmetric spinnaker
- 0 m²
Design
- Type
- ROCK 20
- Builder
- Birka Marin
- Year built
- 1969
- Stability index
- 125.9
Velocity Prediction
| Wind Speed | 52° | 60° | 75° | 90° | 110° | 120° | 135° | 150° |
|---|---|---|---|---|---|---|---|---|
| 6 | 3.75 | 4.03 | 4.22 | 4.25 | 4.36 | 4.23 | 3.82 | 3.32 |
| 8 | 4.5 | 4.81 | 5.02 | 5.19 | 5.31 | 5.19 | 4.75 | 4.22 |
| 10 | 5.08 | 5.35 | 5.54 | 5.73 | 5.81 | 5.75 | 5.52 | 5.01 |
| 12 | 5.44 | 5.63 | 5.79 | 6 | 6.13 | 6.08 | 5.89 | 5.61 |
| 14 | 5.64 | 5.81 | 5.97 | 6.13 | 6.45 | 6.42 | 6.2 | 5.93 |
| 16 | 5.7 | 5.9 | 6.14 | 6.25 | 6.74 | 6.77 | 6.55 | 6.22 |
| 20 | 5.68 | 5.91 | 6.3 | 6.64 | 7.05 | 7.38 | 7.29 | 6.88 |
| Wind Speed | Beat Angle | Beat VMG | Run Angle | Run VMG |
|---|---|---|---|---|
| 6 | 45.7° | 2.39 | 148.7° | 2.88 |
| 8 | 44.2° | 2.9 | 152.3° | 3.66 |
| 10 | 44.2° | 3.28 | 153.8° | 4.35 |
| 12 | 43.8° | 3.61 | 161.9° | 5.01 |
| 14 | 42.7° | 3.82 | 175.7° | 5.51 |
| 16 | 42.3° | 3.87 | 179° | 5.84 |
| 20 | 43.5° | 3.79 | 178.1° | 6.4 |
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