KERL: ORC Rating

GPH

614.9

OSN

598.3

LOA

8.58 m

Displacement

2050 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7593

Medium

0.9998

High

1.1504

Triple Offshore

Low

0.9731

Medium

1.226

High

1.4062

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: 87.7 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.

6,42,4.830821,52,5.4,60,5.68,75,5.9,90,5.93,110,5.99,120,5.84,135,5.22,144.5,4.655359,150,4.38
8,40.3,5.611876,52,6.25,60,6.44,75,6.58,90,6.72,110,6.83,120,6.73,135,6.32,150,5.461734
10,38.2,5.993458,52,6.63,60,6.82,75,7,90,7.18,110,7.49,120,7.39,135,6.98,150,6.35,153,6.206464
12,36.8,6.219314,52,6.87,60,7.07,75,7.41,90,7.53,110,8.07,120,8.11,135,7.61,150,6.99,163,6.483289
14,36.4,6.298968,52,7,60,7.29,75,7.67,90,7.98,110,8.56,120,8.85,135,8.37,150,7.57,180,6.77
16,36,6.303947,52,7.07,60,7.4,75,7.94,90,8.38,110,9,120,9.44,135,9.3,150,8.23,180,7.29
20,36.6,6.389995,52,7.18,60,7.5,75,8.15,90,8.96,110,9.95,120,10.96,135,12.47,136.4,12.400371,150,10.37

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.4	5.68	5.9	5.93	5.99	5.84	5.22	4.38
8	6.25	6.44	6.58	6.72	6.83	6.73	6.32	5.46
10	6.63	6.82	7	7.18	7.49	7.39	6.98	6.35
12	6.87	7.07	7.41	7.53	8.07	8.11	7.61	6.99
14	7	7.29	7.67	7.98	8.56	8.85	8.37	7.57
16	7.07	7.4	7.94	8.38	9	9.44	9.3	8.23
20	7.18	7.5	8.15	8.96	9.95	10.96	12.47	10.37

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42°	3.59	144.5°	3.79
8	40.3°	4.28	150°	4.73
10	38.2°	4.71	153°	5.53
12	36.8°	4.98	163°	6.2
14	36.4°	5.07	180°	6.77
16	36°	5.1	180°	7.29
20	36.6°	5.13	136.4°	8.98

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°	5.40	6.25	6.63	6.87	7.00	7.07	7.18
60°	5.68	6.44	6.82	7.07	7.29	7.40	7.50
75°	5.90	6.58	7.00	7.41	7.67	7.94	8.15
90°	5.93	6.72	7.18	7.53	7.98	8.38	8.96
110°	5.99	6.83	7.49	8.07	8.56	9.00	9.95
120°	5.84	6.73	7.39	8.11	8.85	9.44	10.96
135°	5.22	6.32	6.98	7.61	8.37	9.30	12.47
150°	4.38	5.46	6.35	6.99	7.57	8.23	10.37