SEVEN SPIRIT: ORC Rating

GPH

701.7

OSN

678.8

LOA

7.64 m

Displacement

1325 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5792

Medium

0.7912

High

0.9039

Triple Offshore

Low

0.7458

Medium

0.9643

High

1.0923

Boat Specifications

Dimensions

Length overall: 7.64 m
Beam: 2.38 m
Draft: 1.58 m
Displacement: 1325 kg
Crew weight: 390 kg
Wetted surface: 13.31 m²

Sails

Mainsail: 18.9 m²
Genoa: 16 m²
Spinnaker: 41.08 m²
Asymmetric spinnaker: 0 m²

Design

Type: SURPRISE Q
Builder: ARCHAMBAULT
Designer: JOUBERT/NIVELT
Year built: 1977
Stability index: 96

Performance data

Polar CSV

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

6,42.3,4.191279,52,4.71,60,4.96,75,5.14,90,5.07,110,5.08,120,4.9,135,4.34,146.4,3.817888,150,3.67
8,40.8,4.953797,52,5.56,60,5.76,75,5.89,90,5.97,110,6,120,5.88,135,5.36,150,4.66,150.5,4.64178
10,39,5.468728,52,6,60,6.13,75,6.24,90,6.41,110,6.49,120,6.38,135,6.1,150,5.55,152,5.447662
12,37.5,5.659521,52,6.21,60,6.38,75,6.56,90,6.71,110,7.02,120,6.9,135,6.54,150,6.15,162.2,5.787029
14,36.9,5.727258,52,6.31,60,6.52,75,6.87,90,7,110,7.53,120,7.48,135,7.05,150,6.56,177.2,6.037208
16,36.7,5.749738,52,6.36,60,6.6,75,7.05,90,7.38,110,7.89,120,8.14,135,7.63,150,7.04,177.2,6.417662
20,37.2,5.77505,52,6.38,60,6.66,75,7.21,90,7.85,110,8.49,120,9.23,135,9.2,150,8.18,174.8,7.310085

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.71	4.96	5.14	5.07	5.08	4.9	4.34	3.67
8	5.56	5.76	5.89	5.97	6	5.88	5.36	4.66
10	6	6.13	6.24	6.41	6.49	6.38	6.1	5.55
12	6.21	6.38	6.56	6.71	7.02	6.9	6.54	6.15
14	6.31	6.52	6.87	7	7.53	7.48	7.05	6.56
16	6.36	6.6	7.05	7.38	7.89	8.14	7.63	7.04
20	6.38	6.66	7.21	7.85	8.49	9.23	9.2	8.18

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.3°	3.1	146.4°	3.18
8	40.8°	3.75	150.5°	4.04
10	39°	4.25	152°	4.81
12	37.5°	4.49	162.2°	5.51
14	36.9°	4.58	177.2°	6.03
16	36.7°	4.61	177.2°	6.41
20	37.2°	4.6	174.8°	7.28

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°	4.71	5.56	6.00	6.21	6.31	6.36	6.38
60°	4.96	5.76	6.13	6.38	6.52	6.60	6.66
75°	5.14	5.89	6.24	6.56	6.87	7.05	7.21
90°	5.07	5.97	6.41	6.71	7.00	7.38	7.85
110°	5.08	6.00	6.49	7.02	7.53	7.89	8.49
120°	4.90	5.88	6.38	6.90	7.48	8.14	9.23
135°	4.34	5.36	6.10	6.54	7.05	7.63	9.20
150°	3.67	4.66	5.55	6.15	6.56	7.04	8.18