GEM — ORC Rating | RegattaPages

GPH

625.4

OSN

604.6

LOA

9.99 m

Displacement

2898 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6508

Medium

0.8882

High

1.0189

Triple Offshore

Low

0.8358

Medium

1.0845

High

1.2192

Boat Specifications

Dimensions

Length overall: 9.99 m
Beam: 2.74 m
Draft: 1.79 m
Displacement: 2898 kg
Crew weight: 601 kg
Wetted surface: 20.38 m²

Sails

Mainsail: 28.04 m²
Genoa: 26.34 m²
Spinnaker: 75.42 m²
Asymmetric spinnaker: 0 m²

Design

Type: Adams 10
Designer: Joe Adams
Year built: 1971
Stability index: -1

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.

4,43.3,3.421398,52,3.89,60,4.14,75,4.26,90,4.08,110,4.13,120,3.97,135,3.48,144.7,3.038703,150,2.87
6,43.3,4.740491,52,5.26,60,5.53,75,5.68,90,5.55,110,5.65,120,5.49,135,4.91,144.7,4.386515,150,4.13
8,41,5.604805,52,6.23,60,6.46,75,6.6,90,6.59,110,6.77,120,6.63,135,6.11,148.7,5.360118,150,5.28
10,38.9,6.12919,52,6.79,60,6.96,75,7.08,90,7.08,110,7.34,120,7.29,135,6.95,150,6.28,151.6,6.184288
12,37.6,6.323445,52,7.04,60,7.22,75,7.42,90,7.45,110,7.74,120,7.81,135,7.51,150,7.01,157.4,6.694033
14,37.1,6.419387,52,7.14,60,7.35,75,7.66,90,7.8,110,8.03,120,8.28,135,8.09,150,7.53,165.1,6.995206
16,36.9,6.490058,52,7.21,60,7.43,75,7.81,90,8.09,110,8.28,120,8.67,135,8.69,150,8.06,167.8,7.397056
20,36.8,6.556506,52,7.29,60,7.54,75,8.01,90,8.48,110,8.74,120,9.31,135,10.1,150,9.26,164.6,8.505382
24,37.6,6.563256,52,7.3,60,7.57,75,8.12,90,8.72,110,9.21,120,9.94,135,11.89,143.4,12.256833,150,11.36

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
4	3.89	4.14	4.26	4.08	4.13	3.97	3.48	2.87
6	5.26	5.53	5.68	5.55	5.65	5.49	4.91	4.13
8	6.23	6.46	6.6	6.59	6.77	6.63	6.11	5.28
10	6.79	6.96	7.08	7.08	7.34	7.29	6.95	6.28
12	7.04	7.22	7.42	7.45	7.74	7.81	7.51	7.01
14	7.14	7.35	7.66	7.8	8.03	8.28	8.09	7.53
16	7.21	7.43	7.81	8.09	8.28	8.67	8.69	8.06
20	7.29	7.54	8.01	8.48	8.74	9.31	10.1	9.26
24	7.3	7.57	8.12	8.72	9.21	9.94	11.89	11.36

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
4	43.3°	2.49	144.7°	2.48
6	43.3°	3.45	144.7°	3.58
8	41°	4.23	148.7°	4.58
10	38.9°	4.77	151.6°	5.44
12	37.6°	5.01	157.4°	6.18
14	37.1°	5.12	165.1°	6.76
16	36.9°	5.19	167.8°	7.23
20	36.8°	5.25	164.6°	8.2
24	37.6°	5.2	143.4°	9.84

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