ATHINA: ORC Rating

GPH

748.9

OSN

724.7

LOA

9.34 m

Displacement

4213 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5209

Medium

0.7227

High

0.8586

Triple Offshore

Low

0.6772

Medium

0.9139

High

1.0507

Boat Specifications

Dimensions

Length overall: 9.34 m
Beam: 3.41 m
Draft: 1.61 m
Displacement: 4213 kg
Crew weight: 400 kg
Wetted surface: 20.65 m²

Sails

Mainsail: 19.58 m²
Genoa: 27.93 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 58.06 m²

Design

Type: ATLANTIC 31
Builder: ATLANTIC
Designer: JACOPIN & JACOPIN
Year built: 1990
Stability index: 104.4

Performance data

Polar CSV

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

6,45.6,3.744658,52,4.11,60,4.4,75,4.6,90,4.61,110,4.69,120,4.54,135,4.11,145.2,3.714307,150,3.52
8,43.8,4.461315,52,4.96,60,5.27,75,5.51,90,5.65,110,5.77,120,5.6,135,5.14,146,4.668063,150,4.47
10,43.5,5.059456,52,5.62,60,5.94,75,6.17,90,6.39,110,6.48,120,6.39,135,6.02,145.5,5.533133,150,5.27
12,43,5.551349,52,6.12,60,6.35,75,6.53,90,6.76,110,6.86,120,6.8,135,6.57,146.2,6.173401,150,5.92
14,41.8,5.848612,52,6.4,60,6.58,75,6.75,90,7.01,110,7.18,120,7.14,135,6.92,148.7,6.413416,150,6.33
16,41.4,5.98578,52,6.54,60,6.73,75,6.94,90,7.14,110,7.51,120,7.48,135,7.24,150,6.64,171.8,6.021563
20,41.7,6.067196,52,6.6,60,6.83,75,7.21,90,7.43,110,8.01,120,8.16,135,7.91,150,7.13,177.2,6.687985

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.11	4.4	4.6	4.61	4.69	4.54	4.11	3.52
8	4.96	5.27	5.51	5.65	5.77	5.6	5.14	4.47
10	5.62	5.94	6.17	6.39	6.48	6.39	6.02	5.27
12	6.12	6.35	6.53	6.76	6.86	6.8	6.57	5.92
14	6.4	6.58	6.75	7.01	7.18	7.14	6.92	6.33
16	6.54	6.73	6.94	7.14	7.51	7.48	7.24	6.64
20	6.6	6.83	7.21	7.43	8.01	8.16	7.91	7.13

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	45.6°	2.62	145.2°	3.05
8	43.8°	3.22	146°	3.87
10	43.5°	3.67	145.5°	4.56
12	43°	4.06	146.2°	5.13
14	41.8°	4.36	148.7°	5.48
16	41.4°	4.49	171.8°	5.96
20	41.7°	4.53	177.2°	6.68

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°	4.11	4.96	5.62	6.12	6.40	6.54	6.60
60°	4.40	5.27	5.94	6.35	6.58	6.73	6.83
75°	4.60	5.51	6.17	6.53	6.75	6.94	7.21
90°	4.61	5.65	6.39	6.76	7.01	7.14	7.43
110°	4.69	5.77	6.48	6.86	7.18	7.51	8.01
120°	4.54	5.60	6.39	6.80	7.14	7.48	8.16
135°	4.11	5.14	6.02	6.57	6.92	7.24	7.91
150°	3.52	4.47	5.27	5.92	6.33	6.64	7.13