OKIROI: ORC Rating

GPH

749.8

OSN

726.7

LOA

9.37 m

Displacement

4012 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5965

Medium

0.8128

High

0.9669

Triple Offshore

Low

0.7702

Medium

1.0215

High

1.169

Boat Specifications

Dimensions

Length overall: 9.37 m
Beam: 3.22 m
Draft: 1.75 m
Displacement: 4012 kg
Crew weight: 496 kg
Wetted surface: 20.28 m²

Sails

Mainsail: 19.12 m²
Genoa: 20.95 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 51.93 m²

Design

Type: FIRST 305
Builder: BENETEAU
Designer: J. BERRET
Year built: 1986

Performance data

Polar CSV

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

6,43.2,3.717581,52,4.14,60,4.37,75,4.55,90,4.7,110,4.75,120,4.58,135,4.14,145.8,3.711851,150,3.55
8,41.7,4.406418,52,4.92,60,5.17,75,5.39,90,5.71,110,5.77,120,5.58,135,5.1,146.5,4.628931,150,4.46
10,41.5,4.940212,52,5.57,60,5.85,75,6.07,90,6.38,110,6.4,120,6.3,135,5.95,145.7,5.459399,150,5.21
12,42.1,5.498831,52,6.06,60,6.25,75,6.41,90,6.7,110,6.74,120,6.66,135,6.44,147,6.033358,150,5.84
14,40.9,5.781544,52,6.31,60,6.47,75,6.62,90,6.92,110,7.04,120,6.96,135,6.75,150,6.25,174.1,5.49913
16,40.1,5.909104,52,6.45,60,6.62,75,6.8,90,7.07,110,7.35,120,7.27,135,7.03,150,6.53,176,6.0347
20,40.3,5.913449,52,6.52,60,6.74,75,7.08,90,7.26,110,7.87,120,7.92,135,7.64,150,6.98,178.8,6.631454

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.14	4.37	4.55	4.7	4.75	4.58	4.14	3.55
8	4.92	5.17	5.39	5.71	5.77	5.58	5.1	4.46
10	5.57	5.85	6.07	6.38	6.4	6.3	5.95	5.21
12	6.06	6.25	6.41	6.7	6.74	6.66	6.44	5.84
14	6.31	6.47	6.62	6.92	7.04	6.96	6.75	6.25
16	6.45	6.62	6.8	7.07	7.35	7.27	7.03	6.53
20	6.52	6.74	7.08	7.26	7.87	7.92	7.64	6.98

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.2°	2.71	145.8°	3.07
8	41.7°	3.29	146.5°	3.86
10	41.5°	3.7	145.7°	4.51
12	42.1°	4.08	147°	5.06
14	40.9°	4.37	174.1°	5.47
16	40.1°	4.52	176°	6.02
20	40.3°	4.51	178.8°	6.63

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°	4.14	4.92	5.57	6.06	6.31	6.45	6.52
60°	4.37	5.17	5.85	6.25	6.47	6.62	6.74
75°	4.55	5.39	6.07	6.41	6.62	6.80	7.08
90°	4.70	5.71	6.38	6.70	6.92	7.07	7.26
110°	4.75	5.77	6.40	6.74	7.04	7.35	7.87
120°	4.58	5.58	6.30	6.66	6.96	7.27	7.92
135°	4.14	5.10	5.95	6.44	6.75	7.03	7.64
150°	3.55	4.46	5.21	5.84	6.25	6.53	6.98