Nakra — ORC Rating | RegattaPages

GPH

707

OSN

692.4

LOA

7.62 m

Displacement

1336 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.598

Medium

0.7741

High

0.8483

Triple Offshore

Low

0.7688

Medium

0.9456

High

1.0284

Boat Specifications

Dimensions

Length overall: 7.62 m
Beam: 2.69 m
Draft: 1.39 m
Displacement: 1336 kg
Crew weight: 260 kg
Wetted surface: 11.98 m²

Sails

Mainsail: 20.78 m²
Genoa: 11.71 m²
Spinnaker: 30.01 m²
Asymmetric spinnaker: 0 m²

Design

Type: CT 25 Mod.
Builder: TEVSS
Designer: LenShipInst.Ocean
Year built: 1984

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.

6,42.8,4.402165,52,4.93,60,5.23,75,5.48,90,5.46,110,5.19,120,5,135,4.49,147,3.922875,150,3.8
8,41.6,5.148449,52,5.66,60,5.84,75,5.98,90,6,110,5.97,120,5.86,135,5.46,150,4.78,151,4.733486
10,40.1,5.399248,52,5.92,60,6.1,75,6.28,90,6.33,110,6.41,120,6.31,135,6.02,150,5.59,156,5.352771
12,39.8,5.479748,52,6.01,60,6.22,75,6.51,90,6.64,110,6.83,120,6.76,135,6.43,150,6.07,180,5.54
14,39.9,5.513806,52,6.05,60,6.28,75,6.63,90,6.9,110,7.16,120,7.19,135,6.87,150,6.46,180,6.02
16,40.5,5.523365,52,6.07,60,6.32,75,6.69,90,7.06,110,7.37,120,7.59,135,7.33,150,6.88,180,6.4
20,42.6,5.515577,52,6,60,6.29,75,6.74,90,7.21,110,7.7,120,8.24,135,8.62,150,7.81,180,7.19

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.93	5.23	5.48	5.46	5.19	5	4.49	3.8
8	5.66	5.84	5.98	6	5.97	5.86	5.46	4.78
10	5.92	6.1	6.28	6.33	6.41	6.31	6.02	5.59
12	6.01	6.22	6.51	6.64	6.83	6.76	6.43	6.07
14	6.05	6.28	6.63	6.9	7.16	7.19	6.87	6.46
16	6.07	6.32	6.69	7.06	7.37	7.59	7.33	6.88
20	6	6.29	6.74	7.21	7.7	8.24	8.62	7.81

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	3.23	147°	3.29
8	41.6°	3.85	151°	4.14
10	40.1°	4.13	156°	4.89
12	39.8°	4.21	180°	5.54
14	39.9°	4.23	180°	6.02
16	40.5°	4.2	180°	6.4
20	42.6°	4.06	180°	7.19

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