UNKNOWN LADY NAI — ORC Rating

GPH

546.1

OSN

533.2

LOA

12.518 m

Displacement

5568 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7703

Medium

1.003

High

1.1398

Triple Offshore

Low

0.9885

Medium

1.2245

High

1.3618

Boat Specifications

Dimensions

Length overall: 12.518 m
Beam: 3.75 m
Draft: 2.77 m
Displacement: 5568 kg
Crew weight: 900 kg
Wetted surface: 30.98 m²

Sails

Mainsail: 49.76 m²
Genoa: 64.74 m²
Spinnaker: 123.76 m²
Asymmetric spinnaker: 98.46 m²

Design

Type: SYDNEY 41
Builder: BASHFORD
Designer: MURRAY
Year built: 1994

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.

6,42,5.988066,52,6.68,60,6.96,75,7.13,90,7,110,6.38,120,6.1,135,5.47,142.3,5.017545,150,4.59
8,38.9,6.733114,52,7.5,60,7.7,75,7.81,90,7.76,110,7.51,120,7.37,135,6.8,145.8,6.093723,150,5.82
10,37,6.974396,52,7.79,60,7.99,75,8.19,90,8.21,110,8.12,120,8.06,135,7.68,150,6.89,150.5,6.859265
12,36.4,7.1438,52,7.92,60,8.12,75,8.41,90,8.56,110,8.6,120,8.59,135,8.25,150,7.67,156.1,7.361193
14,36,7.230998,52,8.01,60,8.23,75,8.54,90,8.84,110,9.06,120,9.08,135,8.79,150,8.2,164.2,7.628209
16,35.7,7.302205,52,8.09,60,8.31,75,8.67,90,9.02,110,9.48,120,9.61,135,9.38,150,8.71,175.8,7.911246
20,35.5,7.382245,52,8.15,60,8.4,75,8.86,90,9.37,110,10.18,120,10.72,135,10.85,150,9.9,175.8,8.84375
24,36.6,7.361574,52,8.15,60,8.43,75,8.97,90,9.62,110,10.75,120,11.98,135,13.27,143.6,12.734599,150,11.84

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	6.68	6.96	7.13	7	6.38	6.1	5.47	4.59
8	7.5	7.7	7.81	7.76	7.51	7.37	6.8	5.82
10	7.79	7.99	8.19	8.21	8.12	8.06	7.68	6.89
12	7.92	8.12	8.41	8.56	8.6	8.59	8.25	7.67
14	8.01	8.23	8.54	8.84	9.06	9.08	8.79	8.2
16	8.09	8.31	8.67	9.02	9.48	9.61	9.38	8.71
20	8.15	8.4	8.86	9.37	10.18	10.72	10.85	9.9
24	8.15	8.43	8.97	9.62	10.75	11.98	13.27	11.84

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42°	4.45	142.3°	3.97
8	38.9°	5.24	145.8°	5.04
10	37°	5.57	150.5°	5.97
12	36.4°	5.75	156.1°	6.73
14	36°	5.85	164.2°	7.34
16	35.7°	5.93	175.8°	7.89
20	35.5°	6.01	175.8°	8.82
24	36.6°	5.91	143.6°	10.25

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