ORC Rating | Offwind

GPH

601.1

OSN

590.9

LOA

8.5 m

Displacement

1222 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7078

Medium

0.8826

High

1.0202

Triple Offshore

Low

0.9076

Medium

1.1031

High

1.2487

Boat Specifications

Dimensions

Length overall: 8.5 m
Beam: 2.19 m
Draft: 2 m
Displacement: 1222 kg
Crew weight: 280 kg
Wetted surface: 14.23 m²

Sails

Mainsail: 28.06 m²
Genoa: 17.44 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 72.28 m²

Design

Type: ESSE 850
Builder: PROTEUS YACHTS
Designer: FELCI
Year built: 2004
Stability index: 123.9

Performance data

Polar CSV

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

6,43.5,5.155958,52,5.74,60,6.07,75,6.29,90,6.24,110,6.28,120,6.14,135,5.51,142.4,5.073902,150,4.64
8,40.8,5.746405,52,6.42,60,6.66,75,6.97,90,6.98,110,7.08,120,7.15,135,6.71,146.9,6.111837,150,5.91
10,40.2,5.904718,52,6.58,60,6.84,75,7.31,90,7.69,110,7.59,120,7.87,135,7.65,150,6.77,152,6.659512
12,40.8,5.997397,52,6.64,60,6.94,75,7.5,90,8.07,110,8.12,120,8.43,135,8.8,148.7,7.712484,150,7.61
14,41.2,6.100358,52,6.71,60,7.01,75,7.63,90,8.31,110,8.88,120,9,135,9.82,145.3,9.122489,150,8.66
16,41.4,6.159088,52,6.78,60,7.16,75,7.76,90,8.47,110,9.49,120,9.84,135,10.63,142.8,10.884714,150,10.01
20,42.4,6.188594,52,6.8,60,7.21,75,8.03,90,8.86,110,10.16,120,11.15,135,12.19,148.4,13.548943,150,13.33

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.74	6.07	6.29	6.24	6.28	6.14	5.51	4.64
8	6.42	6.66	6.97	6.98	7.08	7.15	6.71	5.91
10	6.58	6.84	7.31	7.69	7.59	7.87	7.65	6.77
12	6.64	6.94	7.5	8.07	8.12	8.43	8.8	7.61
14	6.71	7.01	7.63	8.31	8.88	9	9.82	8.66
16	6.78	7.16	7.76	8.47	9.49	9.84	10.63	10.01
20	6.8	7.21	8.03	8.86	10.16	11.15	12.19	13.33

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.5°	3.74	142.4°	4.02
8	40.8°	4.35	146.9°	5.12
10	40.2°	4.51	152°	5.88
12	40.8°	4.54	148.7°	6.59
14	41.2°	4.59	145.3°	7.5
16	41.4°	4.62	142.8°	8.67
20	42.4°	4.57	148.4°	11.54

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°	5.74	6.42	6.58	6.64	6.71	6.78	6.80
60°	6.07	6.66	6.84	6.94	7.01	7.16	7.21
75°	6.29	6.97	7.31	7.50	7.63	7.76	8.03
90°	6.24	6.98	7.69	8.07	8.31	8.47	8.86
110°	6.28	7.08	7.59	8.12	8.88	9.49	10.16
120°	6.14	7.15	7.87	8.43	9.00	9.84	11.15
135°	5.51	6.71	7.65	8.80	9.82	10.63	12.19
150°	4.64	5.91	6.77	7.61	8.66	10.01	13.33