BASIC — ORC Rating | RegattaPages

GPH

621.6

OSN

607.1

LOA

9.5 m

Displacement

3167 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6747

Medium

0.8869

High

1.0006

Triple Offshore

Low

0.8664

Medium

1.0769

High

1.1964

Boat Specifications

Dimensions

Length overall: 9.5 m
Beam: 3.24 m
Draft: 2 m
Displacement: 3167 kg
Crew weight: 542 kg
Wetted surface: 19.49 m²

Sails

Mainsail: 35.93 m²
Genoa: 30.32 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.

6,42,5.01921,52,5.62,60,5.92,75,6.15,90,6.11,110,5.74,120,5.55,135,4.99,145,4.44362,150,4.2
8,40.5,5.838986,52,6.46,60,6.63,75,6.76,90,6.77,110,6.7,120,6.58,135,6.09,149.5,5.280694,150,5.26
10,37.9,6.159039,52,6.79,60,6.94,75,7.08,90,7.12,110,7.17,120,7.08,135,6.77,150,6.17,153,6.026892
12,37.1,6.294008,52,6.92,60,7.1,75,7.35,90,7.45,110,7.63,120,7.55,135,7.2,150,6.8,162,6.371861
14,36.8,6.356689,52,6.99,60,7.19,75,7.56,90,7.78,110,8.08,120,8.05,135,7.66,150,7.19,180,6.66
16,36.8,6.381666,52,7.03,60,7.25,75,7.68,90,8.06,110,8.41,120,8.58,135,8.17,150,7.62,180,7.07
20,36.8,6.444109,52,7.11,60,7.34,75,7.78,90,8.36,110,8.93,120,9.52,135,9.48,150,8.62,180,7.9

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.62	5.92	6.15	6.11	5.74	5.55	4.99	4.2
8	6.46	6.63	6.76	6.77	6.7	6.58	6.09	5.26
10	6.79	6.94	7.08	7.12	7.17	7.08	6.77	6.17
12	6.92	7.1	7.35	7.45	7.63	7.55	7.2	6.8
14	6.99	7.19	7.56	7.78	8.08	8.05	7.66	7.19
16	7.03	7.25	7.68	8.06	8.41	8.58	8.17	7.62
20	7.11	7.34	7.78	8.36	8.93	9.52	9.48	8.62

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42°	3.73	145°	3.64
8	40.5°	4.44	149.5°	4.55
10	37.9°	4.86	153°	5.37
12	37.1°	5.02	162°	6.06
14	36.8°	5.09	180°	6.66
16	36.8°	5.11	180°	7.07
20	36.8°	5.16	180°	7.9

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