SILFO — ORC Rating | RegattaPages

GPH

707.8

OSN

685.2

LOA

9.43 m

Displacement

3613 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5655

Medium

0.7806

High

0.9071

Triple Offshore

Low

0.7319

Medium

0.9609

High

1.0828

Boat Specifications

Dimensions

Length overall: 9.43 m
Beam: 3.1 m
Draft: 1.49 m
Displacement: 3613 kg
Crew weight: 450 kg
Wetted surface: 20.01 m²

Sails

Mainsail: 25.83 m²
Genoa: 25.63 m²
Spinnaker: 56.26 m²
Asymmetric spinnaker: 0 m²

Design

Type: DEHLER 31
Builder: DEHLER
Designer: VAN DE STADT
Year built: 1982
Stability index: 126.7

Velocity Prediction

Polar CSV

Each row is TWS followed by TWA and boat-speed pairs. Paste it directly into WX Navigator or compatible navigation software.

6,44.2,4.086981,52,4.53,60,4.83,75,5.04,90,4.98,110,5.01,120,4.85,135,4.38,146.9,3.843772,150,3.72
8,42.6,4.795563,52,5.38,60,5.69,75,5.92,90,5.98,110,6.06,120,5.9,135,5.37,150,4.72,152,4.632212
10,42.6,5.447651,52,6.01,60,6.22,75,6.38,90,6.53,110,6.58,120,6.5,135,6.2,150,5.59,152.9,5.448136
12,40.8,5.799245,52,6.34,60,6.5,75,6.64,90,6.83,110,6.93,120,6.86,135,6.62,150,6.27,159.7,5.928207
14,39.6,5.931112,52,6.51,60,6.67,75,6.85,90,7.05,110,7.29,120,7.22,135,6.96,150,6.65,174.8,6.165374
16,39.4,5.991716,52,6.58,60,6.78,75,7.04,90,7.17,110,7.64,120,7.6,135,7.33,150,6.97,179,6.550998
20,40.6,6.05844,52,6.6,60,6.83,75,7.27,90,7.61,110,8.08,120,8.32,135,8.1,150,7.67,179,7.171092

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.53	4.83	5.04	4.98	5.01	4.85	4.38	3.72
8	5.38	5.69	5.92	5.98	6.06	5.9	5.37	4.72
10	6.01	6.22	6.38	6.53	6.58	6.5	6.2	5.59
12	6.34	6.5	6.64	6.83	6.93	6.86	6.62	6.27
14	6.51	6.67	6.85	7.05	7.29	7.22	6.96	6.65
16	6.58	6.78	7.04	7.17	7.64	7.6	7.33	6.97
20	6.6	6.83	7.27	7.61	8.08	8.32	8.1	7.67

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44.2°	2.93	146.9°	3.22
8	42.6°	3.53	152°	4.09
10	42.6°	4.01	152.9°	4.85
12	40.8°	4.39	159.7°	5.56
14	39.6°	4.57	174.8°	6.14
16	39.4°	4.63	179°	6.55
20	40.6°	4.6	179°	7.17

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