Rapketel — ORC Rating

GPH

717

OSN

697

LOA

8.99 m

Displacement

4070 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.649

Medium

0.8699

High

0.9923

Triple Offshore

Low

0.8278

Medium

1.0601

High

1.1752

Boat Specifications

Dimensions

Length overall: 8.99 m
Beam: 3.1 m
Draft: 1.72 m
Displacement: 4070 kg
Crew weight: 454 kg
Wetted surface: 19.35 m²

Sails

Mainsail: 18.83 m²
Genoa: 34.15 m²
Spinnaker: 70 m²
Asymmetric spinnaker: 0 m²

Design

Type: Shamrock 30
Builder: Southcoast Boatyar
Designer: Ron Holland
Year built: 1975

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.

6,41.7,4.111764,52,4.59,60,4.8,75,4.96,90,4.91,110,4.91,120,4.77,135,4.38,148.2,3.835778,150,3.77
8,40.6,4.754559,52,5.38,60,5.62,75,5.79,90,5.76,110,5.9,120,5.8,135,5.33,150,4.68,152.2,4.589744
10,41.5,5.420881,52,5.92,60,6.07,75,6.19,90,6.27,110,6.38,120,6.32,135,6.1,150,5.54,150.5,5.514987
12,40,5.652414,52,6.16,60,6.29,75,6.42,90,6.51,110,6.69,120,6.65,135,6.46,150,6.15,161.6,5.764715
14,39.3,5.737619,52,6.28,60,6.43,75,6.6,90,6.66,110,6.98,120,6.98,135,6.77,150,6.47,180,6.02
16,39.1,5.798622,52,6.33,60,6.5,75,6.75,90,6.86,110,7.2,120,7.28,135,7.09,150,6.75,180,6.37
20,39.4,5.810541,52,6.36,60,6.55,75,6.9,90,7.18,110,7.45,120,7.71,135,7.7,150,7.34,180,6.91

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.59	4.8	4.96	4.91	4.91	4.77	4.38	3.77
8	5.38	5.62	5.79	5.76	5.9	5.8	5.33	4.68
10	5.92	6.07	6.19	6.27	6.38	6.32	6.1	5.54
12	6.16	6.29	6.42	6.51	6.69	6.65	6.46	6.15
14	6.28	6.43	6.6	6.66	6.98	6.98	6.77	6.47
16	6.33	6.5	6.75	6.86	7.2	7.28	7.09	6.75
20	6.36	6.55	6.9	7.18	7.45	7.71	7.7	7.34

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	41.7°	3.07	148.2°	3.26
8	40.6°	3.61	152.2°	4.06
10	41.5°	4.06	150.5°	4.8
12	40°	4.33	161.6°	5.47
14	39.3°	4.44	180°	6.02
16	39.1°	4.5	180°	6.37
20	39.4°	4.49	180°	6.91

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