Covert Operation — ORC Rating

GPH

715.8

OSN

689.1

LOA

8.202 m

Displacement

1200 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5435

Medium

0.7688

High

0.9109

Triple Offshore

Low

0.7062

Medium

0.9556

High

1.1196

Boat Specifications

Dimensions

Length overall: 8.202 m
Beam: 2.77 m
Draft: 1.37 m
Displacement: 1200 kg
Crew weight: 400 kg
Wetted surface: 14.09 m²

Sails

Mainsail: 16.54 m²
Genoa: 13.46 m²
Spinnaker: 41.51 m²
Asymmetric spinnaker: 0 m²

Design

Type: M27
Builder: Unknown
Designer: Julian Murfield
Year built: 1980
Stability index: 94.4

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.

6,44.4,3.876985,52,4.28,60,4.56,75,4.73,90,4.88,110,4.96,120,4.77,135,4.19,146.6,3.701273,150,3.56
8,42.6,4.659711,52,5.2,60,5.47,75,5.64,90,5.92,110,6.01,120,5.87,135,5.31,150,4.62,150.1,4.61416
10,41.4,5.225893,52,5.82,60,6.05,75,6.21,90,6.53,110,6.64,120,6.52,135,6.19,150,5.54,151.4,5.467076
12,40.5,5.615421,52,6.21,60,6.41,75,6.59,90,6.97,110,7.21,120,7.09,135,6.72,150,6.27,160.1,5.902446
14,39.9,5.917891,52,6.49,60,6.7,75,6.95,90,7.21,110,7.78,120,7.7,135,7.26,150,6.75,174.8,6.165374
16,39.4,5.991716,52,6.65,60,6.93,75,7.28,90,7.39,110,8.34,120,8.44,135,7.88,150,7.23,177.2,6.597877
20,41.2,6.073777,52,6.7,60,7.07,75,7.68,90,8.19,110,9.11,120,10.25,135,9.79,150,8.47,175.7,7.501115

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.28	4.56	4.73	4.88	4.96	4.77	4.19	3.56
8	5.2	5.47	5.64	5.92	6.01	5.87	5.31	4.62
10	5.82	6.05	6.21	6.53	6.64	6.52	6.19	5.54
12	6.21	6.41	6.59	6.97	7.21	7.09	6.72	6.27
14	6.49	6.7	6.95	7.21	7.78	7.7	7.26	6.75
16	6.65	6.93	7.28	7.39	8.34	8.44	7.88	7.23
20	6.7	7.07	7.68	8.19	9.11	10.25	9.79	8.47

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44.4°	2.77	146.6°	3.09
8	42.6°	3.43	150.1°	4
10	41.4°	3.92	151.4°	4.8
12	40.5°	4.27	160.1°	5.55
14	39.9°	4.54	174.8°	6.14
16	39.4°	4.63	177.2°	6.59
20	41.2°	4.57	175.7°	7.48

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