ISABELLA — ORC Rating

GPH

621

OSN

600.7

LOA

12.75 m

Displacement

10047 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6503

Medium

0.8917

High

1.0436

Triple Offshore

Low

0.8352

Medium

1.0943

High

1.2316

Boat Specifications

Dimensions

Length overall: 12.75 m
Beam: 4.06 m
Draft: 2.46 m
Displacement: 10047 kg
Crew weight: 756 kg
Wetted surface: 35.84 m²

Sails

Mainsail: 35.15 m²
Genoa: 66.26 m²
Spinnaker: 117.13 m²
Asymmetric spinnaker: 0 m²

Design

Type: BALTIC 42
Builder: CEN MARINE
Designer: DOUG PETERSON
Year built: 1981
Stability index: 123.8

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.

6,42.6,4.754808,52,5.3,60,5.58,75,5.79,90,5.71,110,5.45,120,5.32,135,4.85,145.7,4.32152,150,4.13
8,40.6,5.53162,52,6.26,60,6.56,75,6.78,90,6.73,110,6.64,120,6.48,135,5.95,150,5.22,150.5,5.193279
10,40.8,6.28802,52,6.98,60,7.17,75,7.31,90,7.31,110,7.38,120,7.3,135,6.9,150,6.14,152,6.036598
12,39.4,6.703475,52,7.31,60,7.47,75,7.59,90,7.62,110,7.77,120,7.72,135,7.46,150,6.97,154.7,6.736111
14,38.1,6.823943,52,7.48,60,7.64,75,7.8,90,7.86,110,8.09,120,8.06,135,7.82,150,7.47,164,6.980409
16,37.5,6.894784,52,7.56,60,7.75,75,7.97,90,8.07,110,8.38,120,8.4,135,8.16,150,7.8,176.6,7.252766
20,37.2,6.942614,52,7.63,60,7.84,75,8.19,90,8.45,110,8.71,120,9,135,8.88,150,8.45,179,7.911205

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.3	5.58	5.79	5.71	5.45	5.32	4.85	4.13
8	6.26	6.56	6.78	6.73	6.64	6.48	5.95	5.22
10	6.98	7.17	7.31	7.31	7.38	7.3	6.9	6.14
12	7.31	7.47	7.59	7.62	7.77	7.72	7.46	6.97
14	7.48	7.64	7.8	7.86	8.09	8.06	7.82	7.47
16	7.56	7.75	7.97	8.07	8.38	8.4	8.16	7.8
20	7.63	7.84	8.19	8.45	8.71	9	8.88	8.45

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.6°	3.5	145.7°	3.57
8	40.6°	4.2	150.5°	4.52
10	40.8°	4.76	152°	5.33
12	39.4°	5.18	154.7°	6.09
14	38.1°	5.37	164°	6.71
16	37.5°	5.47	176.6°	7.24
20	37.2°	5.53	179°	7.91

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