Lethe — ORC Rating | RegattaPages

GPH

628.1

OSN

615.2

LOA

9.98 m

Displacement

4541 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.659

Medium

0.8625

High

0.9674

Triple Offshore

Low

0.8554

Medium

1.0689

High

1.1749

Boat Specifications

Dimensions

Length overall: 9.98 m
Beam: 3.37 m
Draft: 2 m
Displacement: 4541 kg
Crew weight: 586 kg
Wetted surface: 23.38 m²

Sails

Mainsail: 34.69 m²
Genoa: 25.95 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 95.17 m²

Design

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

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.

6,43.5,4.783737,52,5.35,60,5.73,75,6.13,90,6.18,110,5.78,120,5.62,135,5.07,145,4.553489,150,4.31
8,42.8,5.683291,52,6.33,60,6.63,75,6.86,90,6.89,110,6.83,120,6.71,135,6.22,148,5.48318,150,5.37
10,41.2,6.113648,52,6.78,60,7.01,75,7.21,90,7.24,110,7.31,120,7.23,135,6.96,148.8,6.383245,150,6.3
12,39.6,6.255571,52,6.95,60,7.17,75,7.45,90,7.53,110,7.71,120,7.66,135,7.38,150,6.88,150.5,6.847775
14,39,6.343725,52,7.03,60,7.26,75,7.6,90,7.82,110,8.05,120,8.12,135,7.8,150,7.21,174,6.395033
16,39.4,6.431712,52,7.09,60,7.32,75,7.7,90,8.06,110,8.28,120,8.58,135,8.27,150,7.49,177,6.889442
20,39.6,6.515138,52,7.11,60,7.36,75,7.8,90,8.33,110,8.69,120,9.16,135,9.35,150,8.24,178,7.53459

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.35	5.73	6.13	6.18	5.78	5.62	5.07	4.31
8	6.33	6.63	6.86	6.89	6.83	6.71	6.22	5.37
10	6.78	7.01	7.21	7.24	7.31	7.23	6.96	6.3
12	6.95	7.17	7.45	7.53	7.71	7.66	7.38	6.88
14	7.03	7.26	7.6	7.82	8.05	8.12	7.8	7.21
16	7.09	7.32	7.7	8.06	8.28	8.58	8.27	7.49
20	7.11	7.36	7.8	8.33	8.69	9.16	9.35	8.24

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.5°	3.47	145°	3.73
8	42.8°	4.17	148°	4.65
10	41.2°	4.6	148.8°	5.46
12	39.6°	4.82	150.5°	5.96
14	39°	4.93	174°	6.36
16	39.4°	4.97	177°	6.88
20	39.6°	5.02	178°	7.53

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