ALCAPONE: ORC Rating

GPH

494.9

OSN

482.8

LOA

12.78 m

Displacement

4143 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.8271

Medium

1.0855

High

1.2795

Triple Offshore

Low

1.0716

Medium

1.3556

High

1.5653

Boat Specifications

Dimensions

Length overall: 12.78 m
Beam: 3.97 m
Draft: 2.59 m
Displacement: 4143 kg
Crew weight: 930 kg
Wetted surface: 30.91 m²

Sails

Mainsail: 62.51 m²
Genoa: 44.76 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 198.2 m²

Design

Type: GP 42 07
Builder: KINGS MARINE
Designer: B&C
Year built: 2006
Stability index: 126

Performance data

Polar CSV

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

6,44.2,6.053753,52,6.72,60,7.19,75,7.57,90,7.51,110,7.36,120,7.16,135,6.36,141.5,5.877782,150,5.31
8,42,7.131853,52,7.91,60,8.21,75,8.47,90,8.42,110,8.5,120,8.48,135,8.07,141.1,7.594028,150,6.82
10,40,7.401659,52,8.24,60,8.56,75,9.1,90,9.24,110,9.1,120,9.4,135,9.06,148.4,8.12467,150,7.99
12,39.4,7.557585,52,8.4,60,8.76,75,9.47,90,10.01,110,9.7,120,10.1,135,10.3,150,8.97,150.2,8.954032
14,39,7.694822,52,8.52,60,8.9,75,9.71,90,10.47,110,10.54,120,10.78,135,11.53,144.8,10.720253,150,10.11
16,38.7,7.803386,52,8.69,60,9.14,75,9.88,90,10.79,110,11.46,120,11.45,135,12.45,144.7,12.179319,150,11.48
20,39.3,7.882764,52,8.8,60,9.38,75,10.43,90,11.19,110,12.88,120,13.38,135,14.26,146.7,15.242747,150,14.71

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	6.72	7.19	7.57	7.51	7.36	7.16	6.36	5.31
8	7.91	8.21	8.47	8.42	8.5	8.48	8.07	6.82
10	8.24	8.56	9.1	9.24	9.1	9.4	9.06	7.99
12	8.4	8.76	9.47	10.01	9.7	10.1	10.3	8.97
14	8.52	8.9	9.71	10.47	10.54	10.78	11.53	10.11
16	8.69	9.14	9.88	10.79	11.46	11.45	12.45	11.48
20	8.8	9.38	10.43	11.19	12.88	13.38	14.26	14.71

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44.2°	4.34	141.5°	4.6
8	42°	5.3	141.1°	5.91
10	40°	5.67	148.4°	6.92
12	39.4°	5.84	150.2°	7.77
14	39°	5.98	144.8°	8.76
16	38.7°	6.09	144.7°	9.94
20	39.3°	6.1	146.7°	12.74

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°	6.72	7.91	8.24	8.40	8.52	8.69	8.80
60°	7.19	8.21	8.56	8.76	8.90	9.14	9.38
75°	7.57	8.47	9.10	9.47	9.71	9.88	10.43
90°	7.51	8.42	9.24	10.01	10.47	10.79	11.19
110°	7.36	8.50	9.10	9.70	10.54	11.46	12.88
120°	7.16	8.48	9.40	10.10	10.78	11.45	13.38
135°	6.36	8.07	9.06	10.30	11.53	12.45	14.26
150°	5.31	6.82	7.99	8.97	10.11	11.48	14.71