KERL: ORC Rating

GPH

614.9

OSN

598.1

LOA

8.58 m

Displacement

2050 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7595

Medium

1.0003

High

1.1505

Triple Offshore

Low

0.9722

Medium

1.2264

High

1.4068

Boat Specifications

Dimensions

Length overall: 8.58 m
Beam: 3.59 m
Draft: 1.91 m
Displacement: 2050 kg
Crew weight: 471 kg
Wetted surface: 19.06 m²

Sails

Mainsail: 37.17 m²
Genoa: 20.16 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 88.13 m²

Design

Type: PROTO 850
Builder: LEVET & Co
Designer: LEVET Eric
Year built: 1997

Performance data

Polar CSV

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

6,42,4.830821,52,5.39,60,5.64,75,5.85,90,5.92,110,5.98,120,5.82,135,5.21,144.7,4.656078,150,4.38
8,40.2,5.60359,52,6.25,60,6.43,75,6.56,90,6.73,110,6.83,120,6.72,135,6.32,149.7,5.47837,150,5.46
10,38.3,6.00171,52,6.63,60,6.82,75,7,90,7.18,110,7.49,120,7.39,135,6.97,150,6.36,152.7,6.223152
12,36.9,6.23996,52,6.87,60,7.07,75,7.42,90,7.53,110,8.07,120,8.11,135,7.61,150,7,162.3,6.51858
14,36.2,6.295229,52,7,60,7.29,75,7.67,90,7.98,110,8.56,120,8.85,135,8.37,150,7.58,180,6.77
16,36.1,6.324337,52,7.08,60,7.4,75,7.94,90,8.38,110,9,120,9.45,135,9.3,150,8.24,180,7.29
20,36.5,6.394173,52,7.19,60,7.48,75,8.15,90,8.96,110,9.95,120,10.97,135,12.45,136.2,12.386385,150,10.32

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.39	5.64	5.85	5.92	5.98	5.82	5.21	4.38
8	6.25	6.43	6.56	6.73	6.83	6.72	6.32	5.46
10	6.63	6.82	7	7.18	7.49	7.39	6.97	6.36
12	6.87	7.07	7.42	7.53	8.07	8.11	7.61	7
14	7	7.29	7.67	7.98	8.56	8.85	8.37	7.58
16	7.08	7.4	7.94	8.38	9	9.45	9.3	8.24
20	7.19	7.48	8.15	8.96	9.95	10.97	12.45	10.32

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42°	3.59	144.7°	3.8
8	40.2°	4.28	149.7°	4.73
10	38.3°	4.71	152.7°	5.53
12	36.9°	4.99	162.3°	6.21
14	36.2°	5.08	180°	6.77
16	36.1°	5.11	180°	7.29
20	36.5°	5.14	136.2°	8.94

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°	5.39	6.25	6.63	6.87	7.00	7.08	7.19
60°	5.64	6.43	6.82	7.07	7.29	7.40	7.48
75°	5.85	6.56	7.00	7.42	7.67	7.94	8.15
90°	5.92	6.73	7.18	7.53	7.98	8.38	8.96
110°	5.98	6.83	7.49	8.07	8.56	9.00	9.95
120°	5.82	6.72	7.39	8.11	8.85	9.45	10.97
135°	5.21	6.32	6.97	7.61	8.37	9.30	12.45
150°	4.38	5.46	6.36	7.00	7.58	8.24	10.32