ALPHA: ORC Rating

GPH

586.4

OSN

571.1

LOA

10.97 m

Displacement

4343 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7048

Medium

0.9365

High

1.0619

Triple Offshore

Low

0.9078

Medium

1.1479

High

1.2804

Boat Specifications

Dimensions

Length overall: 10.97 m
Beam: 3.4 m
Draft: 2.23 m
Displacement: 4343 kg
Crew weight: 650 kg
Wetted surface: 25.69 m²

Sails

Mainsail: 37.73 m²
Genoa: 43.86 m²
Spinnaker: 101.25 m²
Asymmetric spinnaker: 92.22 m²

Design

Type: BH 36
Builder: BASHFORD
Designer: IMA
Year built: 1996

Performance data

Polar CSV

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

6,42.8,5.219905,52,5.82,60,6.15,75,6.41,90,6.34,110,5.97,120,5.79,135,5.23,141.8,4.860936,150,4.41
8,41.2,6.180101,52,6.87,60,7.09,75,7.23,90,7.2,110,7.13,120,7.01,135,6.49,147.5,5.703164,150,5.55
10,39,6.562474,52,7.28,60,7.47,75,7.63,90,7.63,110,7.7,120,7.63,135,7.32,150,6.581793
12,38.2,6.731506,52,7.43,60,7.63,75,7.92,90,8.01,110,8.19,120,8.18,135,7.82,150,7.32,157,6.996161
14,37.9,6.818031,52,7.5,60,7.72,75,8.11,90,8.38,110,8.57,120,8.76,135,8.39,150,7.78,174,7.078778
16,37.9,6.830704,52,7.54,60,7.77,75,8.23,90,8.68,110,8.9,120,9.28,135,9.02,150,8.29,180,7.54
20,37.7,6.938621,52,7.64,60,7.88,75,8.33,90,8.97,110,9.41,120,10.03,135,10.65,150,9.5,180,8.47

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.82	6.15	6.41	6.34	5.97	5.79	5.23	4.41
8	6.87	7.09	7.23	7.2	7.13	7.01	6.49	5.55
10	7.28	7.47	7.63	7.63	7.7	7.63	7.32	6.58
12	7.43	7.63	7.92	8.01	8.19	8.18	7.82	7.32
14	7.5	7.72	8.11	8.38	8.57	8.76	8.39	7.78
16	7.54	7.77	8.23	8.68	8.9	9.28	9.02	8.29
20	7.64	7.88	8.33	8.97	9.41	10.03	10.65	9.5

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	3.83	141.8°	3.82
8	41.2°	4.65	147.5°	4.81
10	39°	5.1	150°	5.7
12	38.2°	5.29	157°	6.44
14	37.9°	5.38	174°	7.04
16	37.9°	5.39	180°	7.54
20	37.7°	5.49	180°	8.47

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°	5.82	6.87	7.28	7.43	7.50	7.54	7.64
60°	6.15	7.09	7.47	7.63	7.72	7.77	7.88
75°	6.41	7.23	7.63	7.92	8.11	8.23	8.33
90°	6.34	7.20	7.63	8.01	8.38	8.68	8.97
110°	5.97	7.13	7.70	8.19	8.57	8.90	9.41
120°	5.79	7.01	7.63	8.18	8.76	9.28	10.03
135°	5.23	6.49	7.32	7.82	8.39	9.02	10.65
150°	4.41	5.55	6.58	7.32	7.78	8.29	9.50