CALM DAYS — ORC Rating

GPH

742.1

OSN

720.3

LOA

6.578 m

Displacement

1336 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6292

Medium

0.8467

High

0.9583

Triple Offshore

Low

0.8035

Medium

1.0218

High

1.1391

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: 10.33 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.

6,41.4,3.892757,52,4.38,60,4.6,75,4.78,90,4.87,110,4.9,120,4.74,135,4.3,148.5,3.753049,150,3.69
8,40.7,4.603406,52,5.17,60,5.36,75,5.5,90,5.66,110,5.69,120,5.59,135,5.22,150,4.61,152.4,4.513636
10,39.5,5.10611,52,5.6,60,5.73,75,5.83,90,6.04,110,6.07,120,6,135,5.78,150,5.39,156,5.155737
12,37.6,5.313713,52,5.82,60,5.95,75,6.07,90,6.32,110,6.46,120,6.37,135,6.12,150,5.84,180,5.35
14,37.2,5.398416,52,5.93,60,6.1,75,6.31,90,6.47,110,6.85,120,6.78,135,6.5,150,6.16,180,5.79
16,37.4,5.437966,52,5.97,60,6.17,75,6.5,90,6.67,110,7.18,120,7.19,135,6.89,150,6.51,180,6.1
20,37.8,5.492593,52,6.03,60,6.2,75,6.66,90,7.11,110,7.54,120,7.98,135,7.78,150,7.26,180,6.78

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.38	4.6	4.78	4.87	4.9	4.74	4.3	3.69
8	5.17	5.36	5.5	5.66	5.69	5.59	5.22	4.61
10	5.6	5.73	5.83	6.04	6.07	6	5.78	5.39
12	5.82	5.95	6.07	6.32	6.46	6.37	6.12	5.84
14	5.93	6.1	6.31	6.47	6.85	6.78	6.5	6.16
16	5.97	6.17	6.5	6.67	7.18	7.19	6.89	6.51
20	6.03	6.2	6.66	7.11	7.54	7.98	7.78	7.26

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	41.4°	2.92	148.5°	3.2
8	40.7°	3.49	152.4°	4
10	39.5°	3.94	156°	4.71
12	37.6°	4.21	180°	5.35
14	37.2°	4.3	180°	5.79
16	37.4°	4.32	180°	6.1
20	37.8°	4.34	180°	6.78

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