Muskrat: ORC Rating

GPH

604.4

OSN

586.1

LOA

10.494 m

Displacement

3673 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6743

Medium

0.9104

High

1.0343

Triple Offshore

Low

0.8691

Medium

1.1192

High

1.2603

Boat Specifications

Dimensions

Length overall: 10.494 m
Beam: 3.35 m
Draft: 2.17 m
Displacement: 3673 kg
Crew weight: 685 kg
Wetted surface: 23.51 m²

Sails

Mainsail: 36.07 m²
Genoa: 26.86 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 88.45 m²

Design

Type: J 105
Builder: TPI
Designer: Johnstone
Year built: 1992
Stability index: 105.5

Performance data

Polar CSV

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

6,42.3,4.745609,52,5.34,60,5.64,75,5.85,90,5.96,110,5.97,120,5.79,135,5.21,143.4,4.745786,150,4.4
8,40.6,5.650154,52,6.38,60,6.64,75,6.82,90,7.02,110,7.08,120,6.96,135,6.45,146.9,5.741784,150,5.55
10,39,6.317989,52,6.98,60,7.14,75,7.27,90,7.47,110,7.64,120,7.54,135,7.21,149.3,6.594156,150,6.54
12,37,6.536148,52,7.22,60,7.4,75,7.59,90,7.71,110,8.18,120,8.14,135,7.73,150,7.16,150.7,7.120994
14,36.4,6.634416,52,7.33,60,7.55,75,7.88,90,7.99,110,8.62,120,8.79,135,8.34,150,7.54,150.7,7.487937
16,36,6.687128,52,7.4,60,7.64,75,8.1,90,8.37,110,8.97,120,9.42,135,9.03,150,7.94,174.8,7.069094
20,35.7,6.821958,52,7.52,60,7.76,75,8.3,90,8.92,110,9.62,120,10.34,135,10.86,142.6,10.070308,150,9.24

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.34	5.64	5.85	5.96	5.97	5.79	5.21	4.4
8	6.38	6.64	6.82	7.02	7.08	6.96	6.45	5.55
10	6.98	7.14	7.27	7.47	7.64	7.54	7.21	6.54
12	7.22	7.4	7.59	7.71	8.18	8.14	7.73	7.16
14	7.33	7.55	7.88	7.99	8.62	8.79	8.34	7.54
16	7.4	7.64	8.1	8.37	8.97	9.42	9.03	7.94
20	7.52	7.76	8.3	8.92	9.62	10.34	10.86	9.24

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.3°	3.51	143.4°	3.81
8	40.6°	4.29	146.9°	4.81
10	39°	4.91	149.3°	5.67
12	37°	5.22	150.7°	6.21
14	36.4°	5.34	150.7°	6.53
16	36°	5.41	174.8°	7.04
20	35.7°	5.54	142.6°	8

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°	5.34	6.38	6.98	7.22	7.33	7.40	7.52
60°	5.64	6.64	7.14	7.40	7.55	7.64	7.76
75°	5.85	6.82	7.27	7.59	7.88	8.10	8.30
90°	5.96	7.02	7.47	7.71	7.99	8.37	8.92
110°	5.97	7.08	7.64	8.18	8.62	8.97	9.62
120°	5.79	6.96	7.54	8.14	8.79	9.42	10.34
135°	5.21	6.45	7.21	7.73	8.34	9.03	10.86
150°	4.40	5.55	6.54	7.16	7.54	7.94	9.24