SECRET MEN'S BUSINESS #1 — ORC Rating

GPH

536.4

OSN

522.4

LOA

12.75 m

Displacement

5686 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7732

Medium

1.0183

High

1.1503

Triple Offshore

Low

0.9951

Medium

1.2535

High

1.4002

Boat Specifications

Dimensions

Length overall: 12.75 m
Beam: 3.82 m
Draft: 2.78 m
Displacement: 5686 kg
Crew weight: 825 kg
Wetted surface: 30.83 m²

Sails

Mainsail: 60.59 m²
Genoa: 39.87 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 179.88 m²

Design

Type: MBD 42
Builder: P BOLTON
Designer: IAIN MURRAY ASSOC
Year built: 1996

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.

6,42.4,5.470879,52,6.14,60,6.49,75,6.8,90,6.74,110,6.88,120,6.69,135,6,143,5.471833,150,5.04
8,41.2,6.565526,52,7.33,60,7.57,75,7.74,90,7.78,110,7.98,120,7.9,135,7.44,144,6.748931,150,6.31
10,39,7.077178,52,7.82,60,8.02,75,8.21,90,8.22,110,8.55,120,8.58,135,8.18,149.5,7.427789,150,7.39
12,37.9,7.223565,52,7.99,60,8.24,75,8.6,90,8.7,110,8.92,120,9.21,135,8.85,150,8.12,152,7.961967
14,37.5,7.285531,52,8.08,60,8.36,75,8.85,90,9.16,110,9.28,120,9.66,135,9.6,149.5,8.669623,150,8.63
16,37.1,7.372265,52,8.13,60,8.43,75,9,90,9.52,110,9.66,120,10.1,135,10.49,147.2,9.493596,150,9.21
20,37.1,7.46003,52,8.3,60,8.65,75,9.16,90,9.89,110,10.41,120,10.99,135,12.26,142,12.131814,150,11.03

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	6.14	6.49	6.8	6.74	6.88	6.69	6	5.04
8	7.33	7.57	7.74	7.78	7.98	7.9	7.44	6.31
10	7.82	8.02	8.21	8.22	8.55	8.58	8.18	7.39
12	7.99	8.24	8.6	8.7	8.92	9.21	8.85	8.12
14	8.08	8.36	8.85	9.16	9.28	9.66	9.6	8.63
16	8.13	8.43	9	9.52	9.66	10.1	10.49	9.21
20	8.3	8.65	9.16	9.89	10.41	10.99	12.26	11.03

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.4°	4.04	143°	4.37
8	41.2°	4.94	144°	5.46
10	39°	5.5	149.5°	6.4
12	37.9°	5.7	152°	7.03
14	37.5°	5.78	149.5°	7.47
16	37.1°	5.88	147.2°	7.98
20	37.1°	5.95	142°	9.56

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