Sundowner — ORC Rating

GPH

605

OSN

586.9

LOA

12.13 m

Displacement

8204 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6787

Medium

0.9167

High

1.0561

Triple Offshore

Low

0.8707

Medium

1.1179

High

1.2439

Boat Specifications

Dimensions

Length overall: 12.13 m
Beam: 3.71 m
Draft: 2.08 m
Displacement: 8204 kg
Crew weight: 756 kg
Wetted surface: 33.09 m²

Sails

Mainsail: 48.42 m²
Genoa: 45.86 m²
Spinnaker: 135.43 m²
Asymmetric spinnaker: 110.91 m²

Design

Type: Adams 12
Year built: 1976
Stability index: 109.6

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.

6,43,4.854012,52,5.43,60,5.73,75,5.92,90,5.8,110,5.88,120,5.76,135,5.22,142,4.86034,150,4.42
8,41.4,5.745816,52,6.41,60,6.66,75,6.82,90,6.86,110,7,120,6.91,135,6.43,148.7,5.640997,150,5.56
10,39.9,6.321976,52,7,60,7.19,75,7.32,90,7.4,110,7.58,120,7.55,135,7.26,150,6.56,151.1,6.487984
12,38.8,6.608173,52,7.29,60,7.46,75,7.61,90,7.65,110,7.93,120,7.95,135,7.75,150,7.29,157.2,6.964157
14,38.1,6.747698,52,7.43,60,7.61,75,7.81,90,7.9,110,8.2,120,8.29,135,8.14,150,7.74,167.6,7.167194
16,37.6,6.828311,52,7.52,60,7.7,75,7.95,90,8.1,110,8.43,120,8.6,135,8.53,150,8.12,177.2,7.508965
20,37,6.92431,52,7.62,60,7.82,75,8.13,90,8.42,110,8.76,120,9.13,135,9.28,150,8.87,179,8.231254

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.43	5.73	5.92	5.8	5.88	5.76	5.22	4.42
8	6.41	6.66	6.82	6.86	7	6.91	6.43	5.56
10	7	7.19	7.32	7.4	7.58	7.55	7.26	6.56
12	7.29	7.46	7.61	7.65	7.93	7.95	7.75	7.29
14	7.43	7.61	7.81	7.9	8.2	8.29	8.14	7.74
16	7.52	7.7	7.95	8.1	8.43	8.6	8.53	8.12
20	7.62	7.82	8.13	8.42	8.76	9.13	9.28	8.87

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	3.55	142°	3.83
8	41.4°	4.31	148.7°	4.82
10	39.9°	4.85	151.1°	5.68
12	38.8°	5.15	157.2°	6.42
14	38.1°	5.31	167.6°	7
16	37.6°	5.41	177.2°	7.5
20	37°	5.53	179°	8.23

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