ROCKALL IV — ORC Rating

GPH

609

OSN

591.2

LOA

10.34 m

Displacement

3763 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6655

Medium

0.9008

High

1.0177

Triple Offshore

Low

0.8601

Medium

1.1136

High

1.247

Boat Specifications

Dimensions

Length overall: 10.34 m
Beam: 3.39 m
Draft: 1.98 m
Displacement: 3763 kg
Crew weight: 450 kg
Wetted surface: 22.11 m²

Sails

Mainsail: 32.75 m²
Genoa: 26.17 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 100.6 m²

Design

Type: JPK 10.30
Builder: JPK COMPOSITES
Designer: VALER JACQUES
Year built: 2019
Stability index: 120.7

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.

6,43.3,4.658047,52,5.2,60,5.5,75,5.75,90,5.87,110,5.98,120,5.84,135,5.22,143.9,4.740158,150,4.43
8,41.8,5.593741,52,6.26,60,6.56,75,6.77,90,7,110,7.14,120,7.05,135,6.56,146.9,5.789533,150,5.6
10,40.6,6.282339,52,6.96,60,7.15,75,7.28,90,7.37,110,7.71,120,7.65,135,7.35,148.7,6.741109,150,6.65
12,39.4,6.509359,52,7.22,60,7.42,75,7.62,90,7.64,110,8.11,120,8.26,135,7.9,150,7.31,150.7,7.258598
14,39.3,6.642198,52,7.31,60,7.54,75,7.89,90,8.02,110,8.43,120,8.81,135,8.54,148.8,7.797847,150,7.7
16,39.3,6.680966,52,7.35,60,7.6,75,8.06,90,8.4,110,8.73,120,9.21,135,9.3,150,8.11,173.9,7.150486
20,39.2,6.800487,52,7.46,60,7.71,75,8.2,90,8.9,110,9.3,120,9.99,135,11.22,141.7,10.627231,150,9.63

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.2	5.5	5.75	5.87	5.98	5.84	5.22	4.43
8	6.26	6.56	6.77	7	7.14	7.05	6.56	5.6
10	6.96	7.15	7.28	7.37	7.71	7.65	7.35	6.65
12	7.22	7.42	7.62	7.64	8.11	8.26	7.9	7.31
14	7.31	7.54	7.89	8.02	8.43	8.81	8.54	7.7
16	7.35	7.6	8.06	8.4	8.73	9.21	9.3	8.11
20	7.46	7.71	8.2	8.9	9.3	9.99	11.22	9.63

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.3°	3.39	143.9°	3.83
8	41.8°	4.17	146.9°	4.85
10	40.6°	4.77	148.7°	5.76
12	39.4°	5.03	150.7°	6.33
14	39.3°	5.14	148.8°	6.67
16	39.3°	5.17	173.9°	7.11
20	39.2°	5.27	141.7°	8.34

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