Just Fun: ORC Rating

GPH

616.8

OSN

600.4

LOA

9.6 m

Displacement

2892 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7335

Medium

0.9988

High

1.1525

Triple Offshore

Low

0.9543

Medium

1.2317

High

1.4093

Boat Specifications

Dimensions

Length overall: 9.6 m
Beam: 3.28 m
Draft: 1.96 m
Displacement: 2892 kg
Crew weight: 683 kg
Wetted surface: 21.11 m²

Sails

Mainsail: 35.9 m²
Genoa: 31.54 m²
Spinnaker: 65.21 m²
Asymmetric spinnaker: 81.19 m²

Design

Type: Mount Gay 30
Builder: Harvey Yachts
Designer: Alex Simonis
Year built: 1995

Performance data

Polar CSV

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

6,43.3,4.836675,52,5.39,60,5.72,75,6.02,90,6.01,110,5.83,120,5.62,135,4.96,144.6,4.379681,150,4.12
8,42.1,5.700994,52,6.36,60,6.62,75,6.8,90,6.82,110,6.83,120,6.69,135,6.11,149.7,5.223562,150,5.21
10,40.2,6.271308,52,6.87,60,7.06,75,7.23,90,7.34,110,7.38,120,7.23,135,6.9,150,6.21,150.2,6.199832
12,38.3,6.434954,52,7.09,60,7.33,75,7.68,90,7.72,110,8.03,120,7.83,135,7.38,150,6.91,158.9,6.570531
14,37.3,6.511845,52,7.2,60,7.49,75,8.01,90,8.22,110,8.68,120,8.54,135,7.96,150,7.37,180,6.74
16,36.6,6.551925,52,7.28,60,7.59,75,8.18,90,8.7,110,9.09,120,9.39,135,8.63,150,7.9,180,7.18
20,36.6,6.614206,52,7.38,60,7.68,75,8.36,90,9.13,110,9.87,120,10.61,135,10.45,150,9.18,180,8.16

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.39	5.72	6.02	6.01	5.83	5.62	4.96	4.12
8	6.36	6.62	6.8	6.82	6.83	6.69	6.11	5.21
10	6.87	7.06	7.23	7.34	7.38	7.23	6.9	6.21
12	7.09	7.33	7.68	7.72	8.03	7.83	7.38	6.91
14	7.2	7.49	8.01	8.22	8.68	8.54	7.96	7.37
16	7.28	7.59	8.18	8.7	9.09	9.39	8.63	7.9
20	7.38	7.68	8.36	9.13	9.87	10.61	10.45	9.18

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.3°	3.52	144.6°	3.57
8	42.1°	4.23	149.7°	4.51
10	40.2°	4.79	150.2°	5.38
12	38.3°	5.05	158.9°	6.13
14	37.3°	5.18	180°	6.74
16	36.6°	5.26	180°	7.18
20	36.6°	5.31	180°	8.16

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°	5.39	6.36	6.87	7.09	7.20	7.28	7.38
60°	5.72	6.62	7.06	7.33	7.49	7.59	7.68
75°	6.02	6.80	7.23	7.68	8.01	8.18	8.36
90°	6.01	6.82	7.34	7.72	8.22	8.70	9.13
110°	5.83	6.83	7.38	8.03	8.68	9.09	9.87
120°	5.62	6.69	7.23	7.83	8.54	9.39	10.61
135°	4.96	6.11	6.90	7.38	7.96	8.63	10.45
150°	4.12	5.21	6.21	6.91	7.37	7.90	9.18