Lethe — ORC Rating | RegattaPages

GPH

630.7

OSN

614.8

LOA

9.982 m

Displacement

4491 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6591

Medium

0.8653

High

0.9635

Triple Offshore

Low

0.8477

Medium

1.0672

High

1.171

Boat Specifications

Dimensions

Length overall: 9.982 m
Beam: 3.37 m
Draft: 1.99 m
Displacement: 4491 kg
Crew weight: 500 kg
Wetted surface: 23.08 m²

Sails

Mainsail: 35.58 m²
Genoa: 26.39 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 99.36 m²

Design

Type: First 34.7
Builder: Beneteau
Designer: B.Farr
Year built: 2004
Stability index: 127.6

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.

6,43,4.67626,52,5.2,60,5.47,75,5.76,90,5.98,110,5.81,120,5.66,135,5.11,144.3,4.630066,150,4.35
8,40.8,5.455782,52,6.1,60,6.33,75,6.63,90,6.82,110,6.81,120,6.71,135,6.27,147.8,5.58974,150,5.46
10,39.4,5.965834,52,6.63,60,6.81,75,7.04,90,7.26,110,7.32,120,7.27,135,6.99,149.2,6.414735,150,6.36
12,38.8,6.197568,52,6.89,60,7.07,75,7.24,90,7.56,110,7.7,120,7.71,135,7.46,150,6.94,150.1,6.932775
14,38.4,6.277965,52,6.99,60,7.2,75,7.45,90,7.76,110,7.98,120,8.12,135,7.9,150,7.28,169.4,6.460242
16,38.4,6.329005,52,7.05,60,7.27,75,7.6,90,7.9,110,8.31,120,8.49,135,8.35,150,7.59,175.4,6.882168
20,39.9,6.439291,52,7.09,60,7.33,75,7.75,90,8.14,110,8.89,120,9.05,135,9.48,150,8.24,176.3,7.56577

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.2	5.47	5.76	5.98	5.81	5.66	5.11	4.35
8	6.1	6.33	6.63	6.82	6.81	6.71	6.27	5.46
10	6.63	6.81	7.04	7.26	7.32	7.27	6.99	6.36
12	6.89	7.07	7.24	7.56	7.7	7.71	7.46	6.94
14	6.99	7.2	7.45	7.76	7.98	8.12	7.9	7.28
16	7.05	7.27	7.6	7.9	8.31	8.49	8.35	7.59
20	7.09	7.33	7.75	8.14	8.89	9.05	9.48	8.24

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	3.42	144.3°	3.76
8	40.8°	4.13	147.8°	4.73
10	39.4°	4.61	149.2°	5.51
12	38.8°	4.83	150.1°	6.01
14	38.4°	4.92	169.4°	6.35
16	38.4°	4.96	175.4°	6.86
20	39.9°	4.94	176.3°	7.55

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