Muskrat: ORC Rating

GPH

589.2

OSN

573.8

LOA

10.57 m

Displacement

3630 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7179

Medium

0.9293

High

1.0398

Triple Offshore

Low

0.9156

Medium

1.1365

High

1.2573

Boat Specifications

Dimensions

Length overall: 10.57 m
Beam: 3.34 m
Draft: 2.16 m
Displacement: 3630 kg
Crew weight: 630 kg
Wetted surface: 23.61 m²

Sails

Mainsail: 36.07 m²
Genoa: 41.76 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 88.45 m²

Design

Type: J 105 Mod
Builder: TPI
Designer: Johnstone
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.

6,41.8,5.379113,52,6,60,6.25,75,6.39,90,6.24,110,5.98,120,5.8,135,5.21,143,4.758116,150,4.39
8,39.1,6.172311,52,6.85,60,7.02,75,7.11,90,7.05,110,7.07,120,6.93,135,6.42,146.9,5.741784,150,5.55
10,36.9,6.465048,52,7.18,60,7.34,75,7.49,90,7.49,110,7.64,120,7.56,135,7.21,149.4,6.552486,150,6.52
12,36,6.600603,52,7.32,60,7.5,75,7.75,90,7.84,110,8.1,120,8.1,135,7.75,150,7.15,150.2,7.144788
14,35.6,6.690438,52,7.41,60,7.6,75,7.9,90,8.13,110,8.46,120,8.61,135,8.31,149.6,7.594083,150,7.56
16,35.4,6.759676,52,7.48,60,7.68,75,8.02,90,8.34,110,8.74,120,9.13,135,8.91,150,7.95,174.8,7.059052
20,35.1,6.820268,52,7.57,60,7.8,75,8.22,90,8.66,110,9.31,120,10.04,135,10.62,150,8.81,175.5,7.864243
24,36.1,6.844145,52,7.59,60,7.85,75,8.33,90,8.89,110,9.64,120,11.05,135,13.58,141.5,13.352787,150,12.07

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	6	6.25	6.39	6.24	5.98	5.8	5.21	4.39
8	6.85	7.02	7.11	7.05	7.07	6.93	6.42	5.55
10	7.18	7.34	7.49	7.49	7.64	7.56	7.21	6.52
12	7.32	7.5	7.75	7.84	8.1	8.1	7.75	7.15
14	7.41	7.6	7.9	8.13	8.46	8.61	8.31	7.56
16	7.48	7.68	8.02	8.34	8.74	9.13	8.91	7.95
20	7.57	7.8	8.22	8.66	9.31	10.04	10.62	8.81
24	7.59	7.85	8.33	8.89	9.64	11.05	13.58	12.07

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	41.8°	4.01	143°	3.8
8	39.1°	4.79	146.9°	4.81
10	36.9°	5.17	149.4°	5.64
12	36°	5.34	150.2°	6.2
14	35.6°	5.44	149.6°	6.55
16	35.4°	5.51	174.8°	7.03
20	35.1°	5.58	175.5°	7.84
24	36.1°	5.53	141.5°	10.45

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 kt24 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)	Boat speed in 24 kt (kt)
0°	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
52°	6.00	6.85	7.18	7.32	7.41	7.48	7.57	7.59
60°	6.25	7.02	7.34	7.50	7.60	7.68	7.80	7.85
75°	6.39	7.11	7.49	7.75	7.90	8.02	8.22	8.33
90°	6.24	7.05	7.49	7.84	8.13	8.34	8.66	8.89
110°	5.98	7.07	7.64	8.10	8.46	8.74	9.31	9.64
120°	5.80	6.93	7.56	8.10	8.61	9.13	10.04	11.05
135°	5.21	6.42	7.21	7.75	8.31	8.91	10.62	13.58
150°	4.39	5.55	6.52	7.15	7.56	7.95	8.81	12.07