INTRUSION: ORC Rating

GPH

708.3

OSN

683.4

LOA

8.03 m

Displacement

1662 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5675

Medium

0.7838

High

0.9028

Triple Offshore

Low

0.7313

Medium

0.9595

High

1.0895

Boat Specifications

Dimensions

Length overall: 8.03 m
Beam: 2.77 m
Draft: 1.42 m
Displacement: 1662 kg
Crew weight: 417 kg
Wetted surface: 15.54 m²

Sails

Mainsail: 20.32 m²
Genoa: 18.05 m²
Spinnaker: 46.63 m²
Asymmetric spinnaker: 0 m²

Design

Type: S80
Builder: Swarbrick
Designer: Swarbrick
Year built: 1983
Stability index: -1

Performance data

Polar CSV

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

4,43.4,2.972853,52,3.39,60,3.61,75,3.76,90,3.65,110,3.69,120,3.53,135,3.12,147.6,2.570091,150,2.5
6,43.4,4.1152,52,4.58,60,4.83,75,4.98,90,4.96,110,5.01,120,4.84,135,4.31,147.6,3.730778,150,3.63
8,41.4,4.852615,52,5.42,60,5.65,75,5.78,90,5.9,110,5.96,120,5.81,135,5.29,150,4.65,151.8,4.584119
10,40,5.365224,52,5.94,60,6.11,75,6.24,90,6.43,110,6.51,120,6.4,135,6.1,150,5.53,153.7,5.365391
12,38.6,5.668438,52,6.27,60,6.42,75,6.57,90,6.77,110,6.98,120,6.88,135,6.58,150,6.2,162.4,5.812059
14,38.6,5.83478,52,6.43,60,6.63,75,6.87,90,6.95,110,7.42,120,7.36,135,7.05,150,6.64,170,6.173794
16,38.6,5.885962,52,6.49,60,6.72,75,7.09,90,7.22,110,7.79,120,7.87,135,7.53,150,7.07,175.2,6.502806
20,39.9,5.943961,52,6.53,60,6.81,75,7.29,90,7.73,110,8.29,120,8.98,135,8.87,150,8.04,174.8,7.300044
24,42.9,5.979172,52,6.49,60,6.8,75,7.38,90,7.98,110,8.77,120,10.01,135,12.12,139.9,11.609036,150,10.25

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
4	3.39	3.61	3.76	3.65	3.69	3.53	3.12	2.5
6	4.58	4.83	4.98	4.96	5.01	4.84	4.31	3.63
8	5.42	5.65	5.78	5.9	5.96	5.81	5.29	4.65
10	5.94	6.11	6.24	6.43	6.51	6.4	6.1	5.53
12	6.27	6.42	6.57	6.77	6.98	6.88	6.58	6.2
14	6.43	6.63	6.87	6.95	7.42	7.36	7.05	6.64
16	6.49	6.72	7.09	7.22	7.79	7.87	7.53	7.07
20	6.53	6.81	7.29	7.73	8.29	8.98	8.87	8.04
24	6.49	6.8	7.38	7.98	8.77	10.01	12.12	10.25

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
4	43.4°	2.16	147.6°	2.17
6	43.4°	2.99	147.6°	3.15
8	41.4°	3.64	151.8°	4.04
10	40°	4.11	153.7°	4.81
12	38.6°	4.43	162.4°	5.54
14	38.6°	4.56	170°	6.08
16	38.6°	4.6	175.2°	6.48
20	39.9°	4.56	174.8°	7.27
24	42.9°	4.38	139.9°	8.88

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 4 kt6 kt8 kt10 kt12 kt14 kt16 kt20 kt24 kt

Data table

Boat speed by true wind angle and true wind speed
TWA	Boat speed in 4 kt (kt)	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)	Boat speed in 24 kt (kt)
0°	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
52°	3.39	4.58	5.42	5.94	6.27	6.43	6.49	6.53	6.49
60°	3.61	4.83	5.65	6.11	6.42	6.63	6.72	6.81	6.80
75°	3.76	4.98	5.78	6.24	6.57	6.87	7.09	7.29	7.38
90°	3.65	4.96	5.90	6.43	6.77	6.95	7.22	7.73	7.98
110°	3.69	5.01	5.96	6.51	6.98	7.42	7.79	8.29	8.77
120°	3.53	4.84	5.81	6.40	6.88	7.36	7.87	8.98	10.01
135°	3.12	4.31	5.29	6.10	6.58	7.05	7.53	8.87	12.12
150°	2.50	3.63	4.65	5.53	6.20	6.64	7.07	8.04	10.25