SFERIKA — ORC Rating | RegattaPages

GPH

682.6

OSN

660.6

LOA

9.61 m

Displacement

3921 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5851

Medium

0.8068

High

0.9383

Triple Offshore

Low

0.7561

Medium

0.9977

High

1.1259

Boat Specifications

Dimensions

Length overall: 9.61 m
Beam: 3.21 m
Draft: 1.94 m
Displacement: 3921 kg
Crew weight: 460 kg
Wetted surface: 22.46 m²

Sails

Mainsail: 25.27 m²
Genoa: 22.45 m²
Spinnaker: 61.04 m²
Asymmetric spinnaker: 0 m²

Design

Type: First 31.7
Builder: Beneteau
Designer: Finot
Year built: 1998

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.

6,43.5,4.177153,52,4.65,60,4.92,75,5.12,90,5.13,110,5.2,120,5.03,135,4.54,146,4.016706,150,3.85
8,41.8,4.923029,52,5.51,60,5.8,75,6.05,90,6.18,110,6.3,120,6.14,135,5.6,150,4.884383
10,40.9,5.503712,52,6.18,60,6.43,75,6.62,90,6.81,110,6.92,120,6.83,135,6.46,150,5.77,152.5,5.648184
12,40.3,5.952784,52,6.58,60,6.77,75,6.93,90,7.1,110,7.29,120,7.22,135,6.96,150,6.52,157,6.213981
14,39.6,6.125787,52,6.76,60,6.95,75,7.14,90,7.24,110,7.65,120,7.6,135,7.32,150,6.96,175,6.374256
16,39.4,6.15995,52,6.82,60,7.03,75,7.31,90,7.45,110,7.95,120,8.02,135,7.72,150,7.3,180,6.83
20,39.9,6.165556,52,6.81,60,7.05,75,7.46,90,7.89,110,8.33,120,8.74,135,8.64,150,8.07,180,7.5

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.65	4.92	5.12	5.13	5.2	5.03	4.54	3.85
8	5.51	5.8	6.05	6.18	6.3	6.14	5.6	4.89
10	6.18	6.43	6.62	6.81	6.92	6.83	6.46	5.77
12	6.58	6.77	6.93	7.1	7.29	7.22	6.96	6.52
14	6.76	6.95	7.14	7.24	7.65	7.6	7.32	6.96
16	6.82	7.03	7.31	7.45	7.95	8.02	7.72	7.3
20	6.81	7.05	7.46	7.89	8.33	8.74	8.64	8.07

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.5°	3.03	146°	3.33
8	41.8°	3.67	150°	4.23
10	40.9°	4.16	152.5°	5.01
12	40.3°	4.54	157°	5.72
14	39.6°	4.72	175°	6.35
16	39.4°	4.76	180°	6.83
20	39.9°	4.73	180°	7.5

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