OKIROI: ORC Rating

GPH

739.9

OSN

716

LOA

9.37 m

Displacement

4011 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.542

Medium

0.74

High

0.8611

Triple Offshore

Low

0.6987

Medium

0.9208

High

1.0361

Boat Specifications

Dimensions

Length overall: 9.37 m
Beam: 3.22 m
Draft: 1.75 m
Displacement: 4011 kg
Crew weight: 450 kg
Wetted surface: 19.98 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: BERRET
Year built: 1986
Stability index: 117

Performance data

Polar CSV

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

6,43.9,3.885914,52,4.29,60,4.52,75,4.65,90,4.73,110,4.78,120,4.61,135,4.15,144.8,3.744746,150,3.54
8,42.3,4.650967,52,5.16,60,5.39,75,5.54,90,5.75,110,5.81,120,5.64,135,5.19,146.2,4.705262,150,4.52
10,40.8,5.138739,52,5.74,60,5.94,75,6.1,90,6.32,110,6.39,120,6.3,135,5.98,146.2,5.523569,150,5.3
12,40,5.508819,52,6.08,60,6.25,75,6.4,90,6.62,110,6.72,120,6.67,135,6.45,147.3,6.036762,150,5.87
14,39,5.713212,52,6.28,60,6.44,75,6.6,90,6.82,110,6.98,120,6.95,135,6.76,150,6.24,169.4,5.554791
16,38.8,5.812626,52,6.41,60,6.57,75,6.75,90,6.96,110,7.22,120,7.22,135,7.03,150,6.52,173.9,5.993938
20,39,5.854756,52,6.49,60,6.7,75,6.98,90,7.12,110,7.69,120,7.8,135,7.59,150,6.96,179,6.581002

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.29	4.52	4.65	4.73	4.78	4.61	4.15	3.54
8	5.16	5.39	5.54	5.75	5.81	5.64	5.19	4.52
10	5.74	5.94	6.1	6.32	6.39	6.3	5.98	5.3
12	6.08	6.25	6.4	6.62	6.72	6.67	6.45	5.87
14	6.28	6.44	6.6	6.82	6.98	6.95	6.76	6.24
16	6.41	6.57	6.75	6.96	7.22	7.22	7.03	6.52
20	6.49	6.7	6.98	7.12	7.69	7.8	7.59	6.96

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.9°	2.8	144.8°	3.06
8	42.3°	3.44	146.2°	3.91
10	40.8°	3.89	146.2°	4.59
12	40°	4.22	147.3°	5.08
14	39°	4.44	169.4°	5.46
16	38.8°	4.53	173.9°	5.96
20	39°	4.55	179°	6.58

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°	4.29	5.16	5.74	6.08	6.28	6.41	6.49
60°	4.52	5.39	5.94	6.25	6.44	6.57	6.70
75°	4.65	5.54	6.10	6.40	6.60	6.75	6.98
90°	4.73	5.75	6.32	6.62	6.82	6.96	7.12
110°	4.78	5.81	6.39	6.72	6.98	7.22	7.69
120°	4.61	5.64	6.30	6.67	6.95	7.22	7.80
135°	4.15	5.19	5.98	6.45	6.76	7.03	7.59
150°	3.54	4.52	5.30	5.87	6.24	6.52	6.96