AMFITRITI — ORC Rating

GPH

777

OSN

749

LOA

9.34 m

Displacement

4414 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5557

Medium

0.7864

High

0.9696

Triple Offshore

Low

0.7234

Medium

0.9932

High

1.1708

Boat Specifications

Dimensions

Length overall: 9.34 m
Beam: 3.41 m
Draft: 1.61 m
Displacement: 4414 kg
Crew weight: 350 kg
Wetted surface: 21.57 m²

Sails

Mainsail: 19.62 m²
Genoa: 19.72 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 50.68 m²

Design

Type: ATLANTIC 31
Builder: ATLANTIC MARINE
Designer: JACOPIN & JACOPIN
Year built: 1993

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.

6,44.8,3.39642,52,3.76,60,4.02,75,4.24,90,4.52,110,4.59,120,4.43,135,3.97,148,3.478576,150,3.41
8,43.7,4.149566,52,4.59,60,4.86,75,5.14,90,5.54,110,5.61,120,5.44,135,4.96,150,4.38,151,4.344745
10,43.1,4.697586,52,5.22,60,5.53,75,5.88,90,6.32,110,6.37,120,6.25,135,5.82,150,5.19,154.3,5.016219
12,43.2,5.185408,52,5.78,60,6.08,75,6.35,90,6.71,110,6.77,120,6.69,135,6.43,150,5.94,157.3,5.614944
14,43,5.633389,52,6.19,60,6.41,75,6.6,90,6.94,110,7.06,120,6.99,135,6.78,150,6.46,174.6,5.845945
16,41.9,5.857762,52,6.41,60,6.61,75,6.79,90,7.07,110,7.36,120,7.29,135,7.07,150,6.78,180,6.35
20,41.6,5.964177,52,6.55,60,6.78,75,7.08,90,7.24,110,7.88,120,7.93,135,7.71,150,7.34,180,6.95

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	3.76	4.02	4.24	4.52	4.59	4.43	3.97	3.41
8	4.59	4.86	5.14	5.54	5.61	5.44	4.96	4.38
10	5.22	5.53	5.88	6.32	6.37	6.25	5.82	5.19
12	5.78	6.08	6.35	6.71	6.77	6.69	6.43	5.94
14	6.19	6.41	6.6	6.94	7.06	6.99	6.78	6.46
16	6.41	6.61	6.79	7.07	7.36	7.29	7.07	6.78
20	6.55	6.78	7.08	7.24	7.88	7.93	7.71	7.34

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44.8°	2.41	148°	2.95
8	43.7°	3	151°	3.8
10	43.1°	3.43	154.3°	4.52
12	43.2°	3.78	157.3°	5.18
14	43°	4.12	174.6°	5.82
16	41.9°	4.36	180°	6.35
20	41.6°	4.46	180°	6.95

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