RUMTRADER — ORC Rating

GPH

617.2

OSN

600.9

LOA

14.6 m

Displacement

15540 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6547

Medium

0.8777

High

1.0102

Triple Offshore

Low

0.8447

Medium

1.0996

High

1.227

Boat Specifications

Dimensions

Length overall: 14.6 m
Beam: 4.19 m
Draft: 2.39 m
Displacement: 15540 kg
Crew weight: 660 kg
Wetted surface: 43.27 m²

Sails

Mainsail: 48.22 m²
Genoa: 71.94 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 166.67 m²

Design

Type: SWAN 47
Builder: NAUTOR
Designer: SPARKMAN&STEPHENS
Year built: 1975

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.

6,42.8,4.729261,52,5.29,60,5.58,75,5.81,90,5.76,110,5.72,120,5.58,135,5.01,145,4.49245,150,4.25
8,40.7,5.473964,52,6.2,60,6.51,75,6.79,90,6.75,110,6.92,120,6.74,135,6.14,148,5.424221,150,5.31
10,40.9,6.151986,52,6.96,60,7.25,75,7.46,90,7.51,110,7.69,120,7.59,135,7.16,146.5,6.475707,150,6.24
12,42,6.701251,52,7.37,60,7.61,75,7.79,90,7.84,110,8.07,120,8.02,135,7.76,147.5,7.232703,150,7.05
14,41.2,6.871209,52,7.57,60,7.8,75,8,90,8.08,110,8.33,120,8.34,135,8.12,149.5,7.578666,150,7.53
16,40.9,6.985481,52,7.67,60,7.9,75,8.16,90,8.27,110,8.5,120,8.64,135,8.43,150,7.86,174,6.968172
20,40.9,7.078091,52,7.75,60,7.99,75,8.34,90,8.59,110,8.77,120,9.07,135,9.07,150,8.32,178,7.824767

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.29	5.58	5.81	5.76	5.72	5.58	5.01	4.25
8	6.2	6.51	6.79	6.75	6.92	6.74	6.14	5.31
10	6.96	7.25	7.46	7.51	7.69	7.59	7.16	6.24
12	7.37	7.61	7.79	7.84	8.07	8.02	7.76	7.05
14	7.57	7.8	8	8.08	8.33	8.34	8.12	7.53
16	7.67	7.9	8.16	8.27	8.5	8.64	8.43	7.86
20	7.75	7.99	8.34	8.59	8.77	9.07	9.07	8.32

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	3.47	145°	3.68
8	40.7°	4.15	148°	4.6
10	40.9°	4.65	146.5°	5.4
12	42°	4.98	147.5°	6.1
14	41.2°	5.17	149.5°	6.53
16	40.9°	5.28	174°	6.93
20	40.9°	5.35	178°	7.82

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