Jonathan III — ORC Rating

GPH

594.4

OSN

577.9

LOA

11.924 m

Displacement

7359 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6843

Medium

0.9272

High

1.068

Triple Offshore

Low

0.8833

Medium

1.1386

High

1.272

Boat Specifications

Dimensions

Length overall: 11.924 m
Beam: 3.77 m
Draft: 2.43 m
Displacement: 7359 kg
Crew weight: 855 kg
Wetted surface: 31.83 m²

Sails

Mainsail: 47.01 m²
Genoa: 50.81 m²
Spinnaker: 101.95 m²
Asymmetric spinnaker: 0 m²

Design

Type: First 40.7
Builder: Bennetau
Designer: Farr
Year built: 1997

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.

6,42.4,5.064626,52,5.66,60,5.97,75,6.23,90,6.17,110,5.79,120,5.62,135,5.07,144.5,4.557093,150,4.28
8,40.9,5.953535,52,6.7,60,6.97,75,7.16,90,7.15,110,7.01,120,6.85,135,6.25,149,5.448178,150,5.39
10,39.9,6.608746,52,7.3,60,7.48,75,7.61,90,7.63,110,7.67,120,7.58,135,7.18,150,6.37,151,6.311314
12,38.2,6.807855,52,7.55,60,7.72,75,7.89,90,7.94,110,8.08,120,8,135,7.71,150,7.19,155.5,6.912382
14,37.5,6.907389,52,7.64,60,7.83,75,8.1,90,8.22,110,8.46,120,8.42,135,8.1,150,7.68,170,7.047061
16,37.9,7.020798,52,7.69,60,7.9,75,8.24,90,8.5,110,8.76,120,8.87,135,8.52,150,8.05,180,7.49
20,37.5,7.046041,52,7.72,60,7.95,75,8.37,90,8.88,110,9.19,120,9.58,135,9.47,150,8.86,180,8.23

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.66	5.97	6.23	6.17	5.79	5.62	5.07	4.28
8	6.7	6.97	7.16	7.15	7.01	6.85	6.25	5.39
10	7.3	7.48	7.61	7.63	7.67	7.58	7.18	6.37
12	7.55	7.72	7.89	7.94	8.08	8	7.71	7.19
14	7.64	7.83	8.1	8.22	8.46	8.42	8.1	7.68
16	7.69	7.9	8.24	8.5	8.76	8.87	8.52	8.05
20	7.72	7.95	8.37	8.88	9.19	9.58	9.47	8.86

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.4°	3.74	144.5°	3.71
8	40.9°	4.5	149°	4.67
10	39.9°	5.07	151°	5.52
12	38.2°	5.35	155.5°	6.29
14	37.5°	5.48	170°	6.94
16	37.9°	5.54	180°	7.49
20	37.5°	5.59	180°	8.23

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