Blue Jack — ORC Rating

GPH

764.5

OSN

743.4

LOA

6.988 m

Displacement

1100 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6066

Medium

0.8159

High

0.9158

Triple Offshore

Low

0.7799

Medium

0.9924

High

1.101

Boat Specifications

Dimensions

Length overall: 6.988 m
Beam: 2.46 m
Draft: 1.35 m
Displacement: 1100 kg
Crew weight: 301 kg
Wetted surface: 10.31 m²

Sails

Mainsail: 15.13 m²
Genoa: 10.4 m²
Spinnaker: 32.23 m²
Asymmetric spinnaker: 0 m²

Design

Type: Sprinta Sport
Builder: Dehler B.B.
Designer: v.d.Stadt & Prtnrs
Year built: 1978

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.

6,42.7,3.809967,52,4.25,60,4.49,75,4.67,90,4.81,110,4.84,120,4.68,135,4.2,149.3,3.6169,150,3.59
8,42.2,4.495112,52,5.02,60,5.23,75,5.36,90,5.54,110,5.58,120,5.49,135,5.09,150,4.48,153.2,4.358124
10,40.6,4.925775,52,5.42,60,5.56,75,5.68,90,5.92,110,5.98,120,5.9,135,5.67,150,5.27,155.9,5.03925
12,38.8,5.145393,52,5.64,60,5.78,75,5.93,90,6.21,110,6.39,120,6.31,135,6.04,150,5.73,180,5.26
14,38.7,5.227884,52,5.75,60,5.94,75,6.17,90,6.35,110,6.76,120,6.71,135,6.43,150,6.07,180,5.68
16,39.2,5.264893,52,5.78,60,6,75,6.35,90,6.51,110,7.05,120,7.12,135,6.83,150,6.43,180,6.01
20,40.8,5.28405,52,5.77,60,5.99,75,6.47,90,6.89,110,7.36,120,7.86,135,7.78,150,7.19,180,6.69

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.25	4.49	4.67	4.81	4.84	4.68	4.2	3.59
8	5.02	5.23	5.36	5.54	5.58	5.49	5.09	4.48
10	5.42	5.56	5.68	5.92	5.98	5.9	5.67	5.27
12	5.64	5.78	5.93	6.21	6.39	6.31	6.04	5.73
14	5.75	5.94	6.17	6.35	6.76	6.71	6.43	6.07
16	5.78	6	6.35	6.51	7.05	7.12	6.83	6.43
20	5.77	5.99	6.47	6.89	7.36	7.86	7.78	7.19

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.7°	2.8	149.3°	3.11
8	42.2°	3.33	153.2°	3.89
10	40.6°	3.74	155.9°	4.6
12	38.8°	4.01	180°	5.26
14	38.7°	4.08	180°	5.68
16	39.2°	4.08	180°	6.01
20	40.8°	4	180°	6.69

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