ALKA — ORC Rating | RegattaPages

GPH

732.2

OSN

712.2

LOA

9.12 m

Displacement

3976 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5548

Medium

0.7525

High

0.8677

Triple Offshore

Low

0.7146

Medium

0.925

High

1.033

Boat Specifications

Dimensions

Length overall: 9.12 m
Beam: 3.09 m
Draft: 1.58 m
Displacement: 3976 kg
Crew weight: 500 kg
Wetted surface: 18.81 m²

Sails

Mainsail: 17.91 m²
Genoa: 30.88 m²
Spinnaker: 71.67 m²
Asymmetric spinnaker: 0 m²

Design

Type: Conrad 30
Builder: Poland
Designer: Carter
Year built: 1976

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.

6,43.1,3.930633,52,4.39,60,4.65,75,4.84,90,4.8,110,4.91,120,4.77,135,4.37,148,3.820538,150,3.74
8,43.1,4.615412,52,5.15,60,5.46,75,5.68,90,5.71,110,5.9,120,5.8,135,5.33,150,4.66,152.5,4.543349
10,42.8,5.192647,52,5.74,60,5.96,75,6.12,90,6.24,110,6.37,120,6.33,135,6.11,150,5.542563
12,41.2,5.528864,52,6.05,60,6.21,75,6.35,90,6.48,110,6.69,120,6.66,135,6.47,150,6.16,161,5.785185
14,40.5,5.681176,52,6.2,60,6.36,75,6.53,90,6.59,110,6.97,120,6.98,135,6.78,150,6.48,180,6.02
16,40.1,5.726079,52,6.27,60,6.45,75,6.68,90,6.78,110,7.19,120,7.29,135,7.11,150,6.76,180,6.37
20,40.5,5.733779,52,6.29,60,6.49,75,6.86,90,7.12,110,7.43,120,7.71,135,7.72,150,7.36,180,6.92

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.39	4.65	4.84	4.8	4.91	4.77	4.37	3.74
8	5.15	5.46	5.68	5.71	5.9	5.8	5.33	4.66
10	5.74	5.96	6.12	6.24	6.37	6.33	6.11	5.54
12	6.05	6.21	6.35	6.48	6.69	6.66	6.47	6.16
14	6.2	6.36	6.53	6.59	6.97	6.98	6.78	6.48
16	6.27	6.45	6.68	6.78	7.19	7.29	7.11	6.76
20	6.29	6.49	6.86	7.12	7.43	7.71	7.72	7.36

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.1°	2.87	148°	3.24
8	43.1°	3.37	152.5°	4.03
10	42.8°	3.81	150°	4.8
12	41.2°	4.16	161°	5.47
14	40.5°	4.32	180°	6.02
16	40.1°	4.38	180°	6.37
20	40.5°	4.36	180°	6.92

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