Shellback — ORC Rating

GPH

591.1

OSN

573.2

LOA

12.4 m

Displacement

9100 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7499

Medium

1.0405

High

1.2217

Triple Offshore

Low

0.9777

Medium

1.2976

High

1.4757

Boat Specifications

Dimensions

Length overall: 12.4 m
Beam: 3.92 m
Draft: 2.16 m
Displacement: 9100 kg
Crew weight: 883 kg
Wetted surface: 39.22 m²

Sails

Mainsail: 53.04 m²
Genoa: 39.71 m²
Spinnaker: 124.89 m²
Asymmetric spinnaker: 141.51 m²

Design

Type: Dehler 42
Builder: Dehler
Designer: Judel/Vroelijk
Year built: 2010

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.

6,44.1,4.720618,52,5.29,60,5.65,75,5.95,90,5.99,110,6.08,120,5.92,135,5.29,143.2,4.808104,150,4.45
8,42.3,5.637946,52,6.34,60,6.71,75,7.01,90,7.24,110,7.37,120,7.2,135,6.55,147.4,5.768872,150,5.61
10,41.6,6.3921,52,7.17,60,7.47,75,7.69,90,7.94,110,8.07,120,7.97,135,7.55,147.8,6.783321,150,6.63
12,40.8,6.935316,52,7.66,60,7.89,75,8.06,90,8.22,110,8.5,120,8.42,135,8.11,150,7.44,153.9,7.215814
14,39.9,7.130147,52,7.89,60,8.11,75,8.33,90,8.38,110,8.92,120,8.9,135,8.53,150,8.01,162.4,7.490631
16,39.5,7.205577,52,7.97,60,8.21,75,8.54,90,8.66,110,9.22,120,9.43,135,9.02,150,8.4,180,7.75
20,39.4,7.272882,52,8.02,60,8.28,75,8.76,90,9.24,110,9.71,120,10.26,135,10.18,150,9.29,180,8.56

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.29	5.65	5.95	5.99	6.08	5.92	5.29	4.45
8	6.34	6.71	7.01	7.24	7.37	7.2	6.55	5.61
10	7.17	7.47	7.69	7.94	8.07	7.97	7.55	6.63
12	7.66	7.89	8.06	8.22	8.5	8.42	8.11	7.44
14	7.89	8.11	8.33	8.38	8.92	8.9	8.53	8.01
16	7.97	8.21	8.54	8.66	9.22	9.43	9.02	8.4
20	8.02	8.28	8.76	9.24	9.71	10.26	10.18	9.29

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44.1°	3.39	143.2°	3.85
8	42.3°	4.17	147.4°	4.86
10	41.6°	4.78	147.8°	5.74
12	40.8°	5.25	153.9°	6.48
14	39.9°	5.47	162.4°	7.14
16	39.5°	5.56	180°	7.75
20	39.4°	5.62	180°	8.56

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