BSC Sailing School — ORC Rating

GPH

605.8

OSN

588.9

LOA

7.545 m

Displacement

845 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7788

Medium

0.9962

High

1.1715

Triple Offshore

Low

0.9897

Medium

1.2385

High

1.4511

Boat Specifications

Dimensions

Length overall: 7.545 m
Beam: 2.33 m
Draft: 1.7 m
Displacement: 845 kg
Crew weight: 388 kg
Wetted surface: 10.88 m²

Sails

Mainsail: 24.32 m²
Genoa: 12.42 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 53.1 m²

Design

Type: Magic 25
Builder: Bashford Boats
Designer: Iain Murray
Year built: 1998

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.

6,42.6,4.877074,52,5.49,60,5.78,75,5.96,90,5.99,110,6.06,120,5.94,135,5.42,143.4,4.932628,150,4.57
8,39.7,5.666757,52,6.21,60,6.37,75,6.53,90,6.67,110,6.88,120,6.77,135,6.37,148.7,5.781437,150,5.7
10,36.4,5.888976,52,6.59,60,6.84,75,7.13,90,7.17,110,7.7,120,7.7,135,7.13,150,6.45,152.3,6.302282
12,35.5,5.981952,52,6.79,60,7.13,75,7.68,90,7.87,110,8.24,120,8.66,135,8.08,148.8,7.154847,150,7.06
14,35.2,6.020964,52,6.9,60,7.29,75,7.99,90,8.61,110,8.83,120,9.35,135,9.34,145.7,8.279886,150,7.9
16,34.9,6.084239,52,7,60,7.39,75,8.19,90,9.11,110,9.39,120,9.83,135,10.61,139.3,10.367556,150,9.07
20,36.3,6.154394,52,7.17,60,7.66,75,8.61,90,9.66,110,11.25,120,11.69,135,13.19,143.5,13.634268,150,12.66

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.49	5.78	5.96	5.99	6.06	5.94	5.42	4.57
8	6.21	6.37	6.53	6.67	6.88	6.77	6.37	5.7
10	6.59	6.84	7.13	7.17	7.7	7.7	7.13	6.45
12	6.79	7.13	7.68	7.87	8.24	8.66	8.08	7.06
14	6.9	7.29	7.99	8.61	8.83	9.35	9.34	7.9
16	7	7.39	8.19	9.11	9.39	9.83	10.61	9.07
20	7.17	7.66	8.61	9.66	11.25	11.69	13.19	12.66

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.6°	3.59	143.4°	3.96
8	39.7°	4.36	148.7°	4.94
10	36.4°	4.74	152.3°	5.58
12	35.5°	4.87	148.8°	6.12
14	35.2°	4.92	145.7°	6.84
16	34.9°	4.99	139.3°	7.86
20	36.3°	4.96	143.5°	10.96

Loading polar chart…