KOUZINI: ORC Rating

GPH

743.9

OSN

715.9

LOA

9.34 m

Displacement

3300 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5227

Medium

0.7418

High

0.8792

Triple Offshore

Low

0.6783

Medium

0.9233

High

1.0581

Boat Specifications

Dimensions

Length overall: 9.34 m
Beam: 3.41 m
Draft: 1.53 m
Displacement: 3300 kg
Crew weight: 450 kg
Wetted surface: 19.28 m²

Sails

Mainsail: 19.4 m²
Genoa: 26.22 m²
Spinnaker: 62.94 m²
Asymmetric spinnaker: 0 m²

Design

Type: ATLANTIC 31
Builder: ATLANTIC
Designer: JACOPIN & JACOPIN
Year built: 1993
Stability index: 105.5

Performance data

Polar CSV

Each row is TWS followed by TWA and boat-speed pairs. Paste it directly into Offwind or compatible navigation software.

6,46.3,3.748829,52,4.08,60,4.37,75,4.55,90,4.57,110,4.72,120,4.57,135,4.12,146.9,3.64084,150,3.52
8,44.4,4.534813,52,5.01,60,5.3,75,5.48,90,5.63,110,5.79,120,5.65,135,5.2,149.8,4.570306,150,4.56
10,43.5,5.128386,52,5.66,60,5.92,75,6.12,90,6.31,110,6.48,120,6.39,135,6.04,150,5.45,153.2,5.29921
12,42.3,5.529784,52,6.09,60,6.3,75,6.49,90,6.67,110,6.87,120,6.84,135,6.58,150,6.15,157.7,5.836515
14,41.1,5.759303,52,6.34,60,6.54,75,6.73,90,6.85,110,7.19,120,7.19,135,6.97,150,6.62,170,6.082405
16,41.2,5.887709,52,6.47,60,6.68,75,6.92,90,7,110,7.46,120,7.51,135,7.33,150,6.97,177.2,6.467722
20,42,5.961153,52,6.53,60,6.77,75,7.15,90,7.37,110,7.87,120,8.23,135,8.13,150,7.65,179,7.131086

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.08	4.37	4.55	4.57	4.72	4.57	4.12	3.52
8	5.01	5.3	5.48	5.63	5.79	5.65	5.2	4.56
10	5.66	5.92	6.12	6.31	6.48	6.39	6.04	5.45
12	6.09	6.3	6.49	6.67	6.87	6.84	6.58	6.15
14	6.34	6.54	6.73	6.85	7.19	7.19	6.97	6.62
16	6.47	6.68	6.92	7	7.46	7.51	7.33	6.97
20	6.53	6.77	7.15	7.37	7.87	8.23	8.13	7.65

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	46.3°	2.59	146.9°	3.05
8	44.4°	3.24	149.8°	3.95
10	43.5°	3.72	153.2°	4.73
12	42.3°	4.09	157.7°	5.4
14	41.1°	4.34	170°	5.99
16	41.2°	4.43	177.2°	6.46
20	42°	4.43	179°	7.13

VPP POLAR · BOAT SPEED BY TWAKT

TRUE WIND ANGLE —

READ AT ANGLE

Hover or tap the chart, or use the slider, to read boat speeds.

True wind speed 6 kt8 kt10 kt12 kt14 kt16 kt20 kt

Data table

Boat speed by true wind angle and true wind speed
TWA	Boat speed in 6 kt (kt)	Boat speed in 8 kt (kt)	Boat speed in 10 kt (kt)	Boat speed in 12 kt (kt)	Boat speed in 14 kt (kt)	Boat speed in 16 kt (kt)	Boat speed in 20 kt (kt)
0°	0.00	0.00	0.00	0.00	0.00	0.00	0.00
52°	4.08	5.01	5.66	6.09	6.34	6.47	6.53
60°	4.37	5.30	5.92	6.30	6.54	6.68	6.77
75°	4.55	5.48	6.12	6.49	6.73	6.92	7.15
90°	4.57	5.63	6.31	6.67	6.85	7.00	7.37
110°	4.72	5.79	6.48	6.87	7.19	7.46	7.87
120°	4.57	5.65	6.39	6.84	7.19	7.51	8.23
135°	4.12	5.20	6.04	6.58	6.97	7.33	8.13
150°	3.52	4.56	5.45	6.15	6.62	6.97	7.65