BASIC — ORC Rating | RegattaPages

GPH

621

OSN

604.5

LOA

9.5 m

Displacement

3167 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.678

Medium

0.8932

High

1.0105

Triple Offshore

Low

0.8672

Medium

1.079

High

1.1941

Boat Specifications

Dimensions

Length overall: 9.5 m
Beam: 3.24 m
Draft: 2 m
Displacement: 3167 kg
Crew weight: 528 kg
Wetted surface: 19.58 m²

Sails

Mainsail: 35.93 m²
Genoa: 26.99 m²
Spinnaker: 61.47 m²
Asymmetric spinnaker: 0 m²

Design

Type: SEAM 31
Builder: TSUBOI YACHT
Designer: I.YOKOYAMA
Year built: 1999

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.

6,41.7,5.08948,52,5.69,60,5.94,75,6.09,90,5.98,110,5.72,120,5.53,135,4.95,140.6,4.632903,150,4.13
8,39.4,5.862305,52,6.48,60,6.64,75,6.74,90,6.71,110,6.69,120,6.55,135,6.06,148.7,5.313305,150,5.24
10,37,6.173029,52,6.81,60,6.95,75,7.08,90,7.1,110,7.19,120,7.1,135,6.76,150,6.17,153.3,5.999744
12,36.1,6.299584,52,6.95,60,7.11,75,7.32,90,7.4,110,7.58,120,7.54,135,7.22,150,6.79,161.4,6.383416
14,35.8,6.374344,52,7.03,60,7.21,75,7.49,90,7.66,110,7.93,120,7.95,135,7.66,150,7.22,175.8,6.65788
16,35.6,6.419869,52,7.09,60,7.28,75,7.6,90,7.88,110,8.23,120,8.38,135,8.12,150,7.64,178.6,7.072111
20,35.6,6.469063,52,7.16,60,7.38,75,7.78,90,8.21,110,8.7,120,9.28,135,9.3,150,8.58,179,7.861197
24,36.9,6.490058,52,7.17,60,7.42,75,7.88,90,8.45,110,9,120,10.1,135,11.64,150,10.02,175.7,8.804784

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.69	5.94	6.09	5.98	5.72	5.53	4.95	4.13
8	6.48	6.64	6.74	6.71	6.69	6.55	6.06	5.24
10	6.81	6.95	7.08	7.1	7.19	7.1	6.76	6.17
12	6.95	7.11	7.32	7.4	7.58	7.54	7.22	6.79
14	7.03	7.21	7.49	7.66	7.93	7.95	7.66	7.22
16	7.09	7.28	7.6	7.88	8.23	8.38	8.12	7.64
20	7.16	7.38	7.78	8.21	8.7	9.28	9.3	8.58
24	7.17	7.42	7.88	8.45	9	10.1	11.64	10.02

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	41.7°	3.8	140.6°	3.58
8	39.4°	4.53	148.7°	4.54
10	37°	4.93	153.3°	5.36
12	36.1°	5.09	161.4°	6.05
14	35.8°	5.17	175.8°	6.64
16	35.6°	5.22	178.6°	7.07
20	35.6°	5.26	179°	7.86
24	36.9°	5.19	175.7°	8.78

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