Lethe — ORC Rating | RegattaPages

GPH

633.2

OSN

616.5

LOA

9.982 m

Displacement

4444 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6556

Medium

0.8634

High

0.9658

Triple Offshore

Low

0.842

Medium

1.0641

High

1.1711

Boat Specifications

Dimensions

Length overall: 9.982 m
Beam: 3.37 m
Draft: 1.99 m
Displacement: 4444 kg
Crew weight: 500 kg
Wetted surface: 23.12 m²

Sails

Mainsail: 35.38 m²
Genoa: 25.07 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 96.39 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.

6,43.3,4.658047,52,5.16,60,5.42,75,5.61,90,5.86,110,5.79,120,5.64,135,5.1,144.1,4.629392,150,4.33
8,40.9,5.437562,52,6.06,60,6.29,75,6.53,90,6.75,110,6.79,120,6.69,135,6.25,147.8,5.577923,150,5.45
10,39.5,5.948489,52,6.61,60,6.79,75,6.98,90,7.21,110,7.31,120,7.26,135,6.98,149.2,6.391451,150,6.34
12,38.7,6.188893,52,6.87,60,7.05,75,7.22,90,7.51,110,7.68,120,7.69,135,7.44,150,6.91,150.1,6.909704
14,38.4,6.290725,52,6.99,60,7.19,75,7.44,90,7.71,110,7.96,120,8.1,135,7.87,150,7.26,169.8,6.431648
16,38.4,6.354525,52,7.06,60,7.27,75,7.59,90,7.84,110,8.27,120,8.47,135,8.32,150,7.56,174.9,6.867187
20,39.4,6.470535,52,7.11,60,7.35,75,7.75,90,8.12,110,8.84,120,9.02,135,9.41,150,8.21,176.3,7.545728
24,41.4,6.479041,52,7.08,60,7.33,75,7.82,90,8.33,110,9.29,120,9.99,135,11.5,139,11.275861,150,9.83

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.16	5.42	5.61	5.86	5.79	5.64	5.1	4.33
8	6.06	6.29	6.53	6.75	6.79	6.69	6.25	5.45
10	6.61	6.79	6.98	7.21	7.31	7.26	6.98	6.34
12	6.87	7.05	7.22	7.51	7.68	7.69	7.44	6.91
14	6.99	7.19	7.44	7.71	7.96	8.1	7.87	7.26
16	7.06	7.27	7.59	7.84	8.27	8.47	8.32	7.56
20	7.11	7.35	7.75	8.12	8.84	9.02	9.41	8.21
24	7.08	7.33	7.82	8.33	9.29	9.99	11.5	9.83

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.3°	3.39	144.1°	3.75
8	40.9°	4.11	147.8°	4.72
10	39.5°	4.59	149.2°	5.49
12	38.7°	4.83	150.1°	5.99
14	38.4°	4.93	169.8°	6.33
16	38.4°	4.98	174.9°	6.84
20	39.4°	5	176.3°	7.53
24	41.4°	4.86	139°	8.51

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