SFERIKA — ORC Rating | RegattaPages

GPH

673.8

OSN

653

LOA

9.5 m

Displacement

3920 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6737

Medium

0.9224

High

1.0601

Triple Offshore

Low

0.8672

Medium

1.1355

High

1.2702

Boat Specifications

Dimensions

Length overall: 9.5 m
Beam: 3.23 m
Draft: 1.93 m
Displacement: 3920 kg
Crew weight: 460 kg
Wetted surface: 22.38 m²

Sails

Mainsail: 26.2 m²
Genoa: 28.68 m²
Spinnaker: 60.2 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.

6,42.6,4.306497,52,4.82,60,5.08,75,5.29,90,5.23,110,5.16,120,5,135,4.52,146.6,3.988751,150,3.84
8,41,5.08805,52,5.74,60,6.02,75,6.23,90,6.19,110,6.27,120,6.1,135,5.57,150,4.87,150.6,4.843817
10,40.5,5.720628,52,6.39,60,6.59,75,6.73,90,6.81,110,6.88,120,6.79,135,6.43,150,5.75,152.9,5.616635
12,39.5,6.052166,52,6.68,60,6.85,75,7.01,90,7.1,110,7.25,120,7.18,135,6.92,150,6.49,157.6,6.165188
14,39,6.137843,52,6.78,60,6.98,75,7.2,90,7.29,110,7.62,120,7.56,135,7.27,150,6.92,180,6.33
16,39,6.189314,52,6.83,60,7.03,75,7.35,90,7.54,110,7.94,120,7.97,135,7.66,150,7.25,180,6.81
20,39.5,6.194722,52,6.82,60,7.05,75,7.45,90,7.92,110,8.31,120,8.71,135,8.56,150,8.01,180,7.46

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.82	5.08	5.29	5.23	5.16	5	4.52	3.84
8	5.74	6.02	6.23	6.19	6.27	6.1	5.57	4.87
10	6.39	6.59	6.73	6.81	6.88	6.79	6.43	5.75
12	6.68	6.85	7.01	7.1	7.25	7.18	6.92	6.49
14	6.78	6.98	7.2	7.29	7.62	7.56	7.27	6.92
16	6.83	7.03	7.35	7.54	7.94	7.97	7.66	7.25
20	6.82	7.05	7.45	7.92	8.31	8.71	8.56	8.01

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.6°	3.17	146.6°	3.33
8	41°	3.84	150.6°	4.22
10	40.5°	4.35	152.9°	5
12	39.5°	4.67	157.6°	5.7
14	39°	4.77	180°	6.33
16	39°	4.81	180°	6.81
20	39.5°	4.78	180°	7.46

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