GEM — ORC Rating | RegattaPages

GPH

627.3

OSN

606.9

LOA

9.99 m

Displacement

2905 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6431

Medium

0.8821

High

1.0173

Triple Offshore

Low

0.8298

Medium

1.0825

High

1.2211

Boat Specifications

Dimensions

Length overall: 9.99 m
Beam: 2.74 m
Draft: 1.79 m
Displacement: 2905 kg
Crew weight: 601 kg
Wetted surface: 20.22 m²

Sails

Mainsail: 28.04 m²
Genoa: 26.34 m²
Spinnaker: 75.76 m²
Asymmetric spinnaker: 0 m²

Design

Type: Adams 10
Designer: Joe Adams
Year built: 1980
Stability index: 118.9

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.

6,42.6,4.714052,52,5.3,60,5.57,75,5.71,90,5.56,110,5.61,120,5.42,135,4.76,143.9,4.294608,150,4
8,40.6,5.597472,52,6.26,60,6.49,75,6.63,90,6.6,110,6.75,120,6.62,135,6.02,147.8,5.247029,150,5.13
10,38.8,6.133411,52,6.81,60,6.97,75,7.1,90,7.11,110,7.36,120,7.3,135,6.94,148.7,6.226163,150,6.15
12,37.6,6.323445,52,7.04,60,7.23,75,7.43,90,7.47,110,7.81,120,7.84,135,7.49,150,6.96,155.4,6.719927
14,37,6.423456,52,7.15,60,7.36,75,7.67,90,7.82,110,8.15,120,8.34,135,8.06,150,7.47,166.4,6.882992
16,36.9,6.502563,52,7.23,60,7.45,75,7.83,90,8.11,110,8.42,120,8.8,135,8.66,150,7.99,175.4,7.223267
20,37,6.586234,52,7.31,60,7.56,75,8.02,90,8.5,110,8.92,120,9.52,135,10.1,150,9.15,174.8,8.173639

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.3	5.57	5.71	5.56	5.61	5.42	4.76	4
8	6.26	6.49	6.63	6.6	6.75	6.62	6.02	5.13
10	6.81	6.97	7.1	7.11	7.36	7.3	6.94	6.15
12	7.04	7.23	7.43	7.47	7.81	7.84	7.49	6.96
14	7.15	7.36	7.67	7.82	8.15	8.34	8.06	7.47
16	7.23	7.45	7.83	8.11	8.42	8.8	8.66	7.99
20	7.31	7.56	8.02	8.5	8.92	9.52	10.1	9.15

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.6°	3.47	143.9°	3.47
8	40.6°	4.25	147.8°	4.44
10	38.8°	4.78	148.7°	5.32
12	37.6°	5.01	155.4°	6.11
14	37°	5.13	166.4°	6.69
16	36.9°	5.2	175.4°	7.2
20	37°	5.26	174.8°	8.14

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