CALM DAYS — ORC Rating

GPH

741.2

OSN

720.8

LOA

6.578 m

Displacement

1336 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5607

Medium

0.7512

High

0.8458

Triple Offshore

Low

0.7178

Medium

0.9079

High

1.0092

Boat Specifications

Dimensions

Length overall: 6.578 m
Beam: 2.49 m
Draft: 1.45 m
Displacement: 1336 kg
Crew weight: 250 kg
Wetted surface: 11.64 m²

Sails

Mainsail: 17.75 m²
Genoa: 10.84 m²
Spinnaker: 32.41 m²
Asymmetric spinnaker: 0 m²

Design

Type: FIRST 235 (LK)
Builder: BENETEAU
Designer: BERRET
Year built: 1986

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.

6,42,3.942704,52,4.44,60,4.69,75,4.88,90,4.91,110,4.93,120,4.77,135,4.33,148,3.785163,150,3.71
8,41.2,4.625108,52,5.19,60,5.39,75,5.54,90,5.67,110,5.7,120,5.61,135,5.24,150,4.63,152,4.541606
10,39.8,5.102283,52,5.6,60,5.73,75,5.84,90,6.04,110,6.09,120,6.02,135,5.79,150,5.4,156,5.17763
12,38.1,5.311747,52,5.81,60,5.95,75,6.08,90,6.32,110,6.48,120,6.39,135,6.14,150,5.85,180,5.37
14,37.9,5.398664,52,5.92,60,6.09,75,6.32,90,6.46,110,6.87,120,6.8,135,6.52,150,6.17,180,5.8
16,37.9,5.411337,52,5.95,60,6.16,75,6.51,90,6.69,110,7.2,120,7.22,135,6.92,150,6.53,180,6.12
20,39,5.481596,52,5.98,60,6.17,75,6.64,90,7.12,110,7.56,120,8.02,135,7.85,150,7.29,180,6.81

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.44	4.69	4.88	4.91	4.93	4.77	4.33	3.71
8	5.19	5.39	5.54	5.67	5.7	5.61	5.24	4.63
10	5.6	5.73	5.84	6.04	6.09	6.02	5.79	5.4
12	5.81	5.95	6.08	6.32	6.48	6.39	6.14	5.85
14	5.92	6.09	6.32	6.46	6.87	6.8	6.52	6.17
16	5.95	6.16	6.51	6.69	7.2	7.22	6.92	6.53
20	5.98	6.17	6.64	7.12	7.56	8.02	7.85	7.29

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42°	2.93	148°	3.21
8	41.2°	3.48	152°	4.01
10	39.8°	3.92	156°	4.73
12	38.1°	4.18	180°	5.37
14	37.9°	4.26	180°	5.8
16	37.9°	4.27	180°	6.12
20	39°	4.26	180°	6.81

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