Thetis-4 — ORC Rating

GPH

588.5

OSN

571

LOA

11.924 m

Displacement

7380 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6928

Medium

0.9403

High

1.0846

Triple Offshore

Low

0.8915

Medium

1.1507

High

1.2874

Boat Specifications

Dimensions

Length overall: 11.924 m
Beam: 3.77 m
Draft: 2.43 m
Displacement: 7380 kg
Crew weight: 751 kg
Wetted surface: 31.79 m²

Sails

Mainsail: 49.48 m²
Genoa: 38.25 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 126.09 m²

Design

Type: First40.7
Builder: Beneteau
Designer: B.FARR
Year built: 1997
Stability index: 124.8

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.

6,42.6,4.904244,52,5.48,60,5.78,75,6.02,90,6.01,110,6.08,120,5.93,135,5.37,142.4,4.98555,150,4.57
8,40.8,5.772825,52,6.51,60,6.81,75,7.02,90,7.17,110,7.28,120,7.15,135,6.62,147.1,5.859795,150,5.68
10,40.2,6.506973,52,7.21,60,7.4,75,7.54,90,7.7,110,7.84,120,7.77,135,7.47,149.3,6.745345,150,6.7
12,38.4,6.813889,52,7.53,60,7.69,75,7.84,90,7.91,110,8.24,120,8.21,135,7.93,150,7.45,156.5,7.131485
14,38.1,6.976434,52,7.65,60,7.85,75,8.08,90,8.15,110,8.58,120,8.68,135,8.37,150,7.88,167.6,7.310538
16,37.6,7.017636,52,7.72,60,7.93,75,8.26,90,8.43,110,8.82,120,9.12,135,8.86,150,8.28,177.2,7.649132
20,36.9,7.140315,52,7.81,60,8,75,8.43,90,8.9,110,9.25,120,9.72,135,9.96,150,9.2,177.2,8.420052

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.48	5.78	6.02	6.01	6.08	5.93	5.37	4.57
8	6.51	6.81	7.02	7.17	7.28	7.15	6.62	5.68
10	7.21	7.4	7.54	7.7	7.84	7.77	7.47	6.7
12	7.53	7.69	7.84	7.91	8.24	8.21	7.93	7.45
14	7.65	7.85	8.08	8.15	8.58	8.68	8.37	7.88
16	7.72	7.93	8.26	8.43	8.82	9.12	8.86	8.28
20	7.81	8	8.43	8.9	9.25	9.72	9.96	9.2

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.6°	3.61	142.4°	3.95
8	40.8°	4.37	147.1°	4.92
10	40.2°	4.97	149.3°	5.8
12	38.4°	5.34	156.5°	6.54
14	38.1°	5.49	167.6°	7.14
16	37.6°	5.56	177.2°	7.64
20	36.9°	5.71	177.2°	8.41

Loading polar chart…