SHEARWATER — ORC Rating

GPH

576.6

OSN

558.1

LOA

12.244 m

Displacement

7129 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7057

Medium

0.961

High

1.0883

Triple Offshore

Low

0.9076

Medium

1.1772

High

1.3112

Boat Specifications

Dimensions

Length overall: 12.244 m
Beam: 3.67 m
Draft: 2.17 m
Displacement: 7129 kg
Crew weight: 811 kg
Wetted surface: 33.26 m²

Sails

Mainsail: 44.47 m²
Genoa: 46.27 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 165.63 m²

Design

Type: J 120
Builder: J Composites
Designer: JOHNSTONE
Year built: 1994

Velocity Prediction

Polar CSV

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

6,43.2,5.075664,52,5.66,60,5.97,75,6.16,90,6,110,6.17,120,6.06,135,5.37,143.3,4.914093,150,4.55
8,41.2,6.033905,52,6.73,60,6.98,75,7.13,90,7.15,110,7.38,120,7.3,135,6.79,146.9,5.956653,150,5.76
10,39.4,6.664652,52,7.37,60,7.54,75,7.67,90,7.7,110,8,120,7.98,135,7.69,147.5,7.042993,150,6.86
12,37.8,6.96066,52,7.68,60,7.84,75,8,90,8.01,110,8.4,120,8.46,135,8.23,150,7.65,150.4,7.613615
14,36.9,7.07779,52,7.83,60,8.02,75,8.24,90,8.31,110,8.69,120,8.9,135,8.75,149.9,8.067952,150,8.06
16,36.4,7.156224,52,7.92,60,8.13,75,8.43,90,8.58,110,8.94,120,9.3,135,9.27,150,8.4,171.2,7.397076
20,36.1,7.277319,52,8.04,60,8.26,75,8.66,90,9,110,9.39,120,9.94,135,10.6,150,9.13,175.2,8.158613
24,36.4,7.317736,52,8.08,60,8.33,75,8.81,90,9.29,110,9.82,120,10.65,135,12.86,140.8,12.813821,150,11.47

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.66	5.97	6.16	6	6.17	6.06	5.37	4.55
8	6.73	6.98	7.13	7.15	7.38	7.3	6.79	5.76
10	7.37	7.54	7.67	7.7	8	7.98	7.69	6.86
12	7.68	7.84	8	8.01	8.4	8.46	8.23	7.65
14	7.83	8.02	8.24	8.31	8.69	8.9	8.75	8.06
16	7.92	8.13	8.43	8.58	8.94	9.3	9.27	8.4
20	8.04	8.26	8.66	9	9.39	9.94	10.6	9.13
24	8.08	8.33	8.81	9.29	9.82	10.65	12.86	11.47

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.2°	3.7	143.3°	3.94
8	41.2°	4.54	146.9°	4.99
10	39.4°	5.15	147.5°	5.94
12	37.8°	5.5	150.4°	6.62
14	36.9°	5.66	149.9°	6.98
16	36.4°	5.76	171.2°	7.31
20	36.1°	5.88	175.2°	8.13
24	36.4°	5.89	140.8°	9.93

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