Shellback — ORC Rating

GPH

591.1

OSN

571.5

LOA

12.4 m

Displacement

9100 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6691

Medium

0.9283

High

1.0833

Triple Offshore

Low

0.868

Medium

1.1549

High

1.3112

Boat Specifications

Dimensions

Length overall: 12.4 m
Beam: 3.92 m
Draft: 2.16 m
Displacement: 9100 kg
Crew weight: 882 kg
Wetted surface: 39.12 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
Stability index: 122.2

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.

6,44.8,4.819815,52,5.31,60,5.65,75,5.87,90,5.91,110,6,120,5.84,135,5.22,143.3,4.751953,150,4.4
8,42.6,5.76011,52,6.41,60,6.72,75,6.94,90,7.12,110,7.29,120,7.13,135,6.54,146.9,5.813407,150,5.62
10,41.1,6.449358,52,7.17,60,7.43,75,7.63,90,7.84,110,8.04,120,7.95,135,7.53,147.8,6.818774,150,6.66
12,40,6.866442,52,7.63,60,7.86,75,8.04,90,8.18,110,8.53,120,8.48,135,8.15,149.2,7.520724,150,7.46
14,39.4,7.052884,52,7.86,60,8.1,75,8.34,90,8.39,110,8.95,120,8.98,135,8.64,150,8.01,161,7.530259
16,39.3,7.172023,52,7.96,60,8.22,75,8.57,90,8.7,110,9.27,120,9.47,135,9.16,150,8.46,173.6,7.768413
20,39.3,7.236636,52,8.05,60,8.33,75,8.82,90,9.23,110,9.75,120,10.31,135,10.3,150,9.38,177.2,8.620291

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.31	5.65	5.87	5.91	6	5.84	5.22	4.4
8	6.41	6.72	6.94	7.12	7.29	7.13	6.54	5.62
10	7.17	7.43	7.63	7.84	8.04	7.95	7.53	6.66
12	7.63	7.86	8.04	8.18	8.53	8.48	8.15	7.46
14	7.86	8.1	8.34	8.39	8.95	8.98	8.64	8.01
16	7.96	8.22	8.57	8.7	9.27	9.47	9.16	8.46
20	8.05	8.33	8.82	9.23	9.75	10.31	10.3	9.38

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44.8°	3.42	143.3°	3.81
8	42.6°	4.24	146.9°	4.87
10	41.1°	4.86	147.8°	5.77
12	40°	5.26	149.2°	6.46
14	39.4°	5.45	161°	7.12
16	39.3°	5.55	173.6°	7.72
20	39.3°	5.6	177.2°	8.61

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