Shellback — ORC Rating

GPH

593.7

OSN

574.3

LOA

12.4 m

Displacement

9100 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7448

Medium

1.0397

High

1.2241

Triple Offshore

Low

0.9678

Medium

1.2946

High

1.477

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: 53.58 m²
Genoa: 39.42 m²
Spinnaker: 124.89 m²
Asymmetric spinnaker: 116.08 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.

6,44,4.726556,52,5.25,60,5.58,75,5.85,90,5.9,110,5.94,120,5.76,135,5.19,144.1,4.666427,150,4.37
8,42.3,5.651466,52,6.33,60,6.67,75,6.95,90,7.17,110,7.24,120,7.03,135,6.44,148.2,5.647772,150,5.54
10,41.8,6.425425,52,7.18,60,7.47,75,7.68,90,7.91,110,8,120,7.88,135,7.44,150,6.56,150.6,6.531118
12,40.7,6.951275,52,7.67,60,7.89,75,8.07,90,8.28,110,8.43,120,8.35,135,8.04,150,7.43,153.9,7.22695
14,39.8,7.145799,52,7.9,60,8.12,75,8.34,90,8.44,110,8.87,120,8.82,135,8.46,150,8.01,162.3,7.494792
16,39.3,7.210791,52,7.98,60,8.22,75,8.55,90,8.68,110,9.29,120,9.32,135,8.92,150,8.4,180,7.75
20,39.2,7.277941,52,8.03,60,8.29,75,8.77,90,9.24,110,9.81,120,10.36,135,10.05,150,9.3,180,8.56

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.25	5.58	5.85	5.9	5.94	5.76	5.19	4.37
8	6.33	6.67	6.95	7.17	7.24	7.03	6.44	5.54
10	7.18	7.47	7.68	7.91	8	7.88	7.44	6.56
12	7.67	7.89	8.07	8.28	8.43	8.35	8.04	7.43
14	7.9	8.12	8.34	8.44	8.87	8.82	8.46	8.01
16	7.98	8.22	8.55	8.68	9.29	9.32	8.92	8.4
20	8.03	8.29	8.77	9.24	9.81	10.36	10.05	9.3

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44°	3.4	144.1°	3.78
8	42.3°	4.18	148.2°	4.8
10	41.8°	4.79	150.6°	5.69
12	40.7°	5.27	153.9°	6.49
14	39.8°	5.49	162.3°	7.14
16	39.3°	5.58	180°	7.75
20	39.2°	5.64	180°	8.56

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