THIRZA — ORC Rating | RegattaPages

GPH

647.5

OSN

635.2

LOA

9.85 m

Displacement

3875 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.657

Medium

0.8439

High

0.9278

Triple Offshore

Low

0.8427

Medium

1.0317

High

1.1147

Boat Specifications

Dimensions

Length overall: 9.85 m
Beam: 2.81 m
Draft: 1.43 m
Displacement: 3875 kg
Crew weight: 320 kg
Wetted surface: 20.31 m²

Sails

Mainsail: 33.4 m²
Genoa: 29.58 m²
Spinnaker: 105.08 m²
Asymmetric spinnaker: 0 m²

Design

Type: NISSEN 33
Builder: MICHELSEN
Designer: G.NISSEN
Year built: 1996

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.

6,43.5,4.604519,52,5.13,60,5.44,75,5.72,90,5.71,110,5.85,120,5.76,135,5.3,142,4.961861,150,4.52
8,42.8,5.397082,52,6.02,60,6.3,75,6.49,90,6.51,110,6.73,120,6.7,135,6.4,149,5.623173,150,5.56
10,42.8,5.887725,52,6.44,60,6.66,75,6.82,90,6.87,110,7.06,120,7.13,135,6.94,150,6.45,153,6.307473
12,41.8,5.996169,52,6.58,60,6.79,75,7.02,90,7.12,110,7.26,120,7.47,135,7.35,150,6.97,163,6.535573
14,41.6,6.044412,52,6.63,60,6.85,75,7.13,90,7.34,110,7.45,120,7.72,135,7.8,150,7.35,180,6.78
16,42,6.055347,52,6.65,60,6.87,75,7.19,90,7.53,110,7.64,120,7.95,135,8.27,150,7.78,180,7.16
20,42.9,6.088381,52,6.67,60,6.9,75,7.22,90,7.71,110,7.96,120,8.33,135,8.97,150,8.71,180,7.96

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.13	5.44	5.72	5.71	5.85	5.76	5.3	4.52
8	6.02	6.3	6.49	6.51	6.73	6.7	6.4	5.56
10	6.44	6.66	6.82	6.87	7.06	7.13	6.94	6.45
12	6.58	6.79	7.02	7.12	7.26	7.47	7.35	6.97
14	6.63	6.85	7.13	7.34	7.45	7.72	7.8	7.35
16	6.65	6.87	7.19	7.53	7.64	7.95	8.27	7.78
20	6.67	6.9	7.22	7.71	7.96	8.33	8.97	8.71

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.5°	3.34	142°	3.91
8	42.8°	3.96	149°	4.82
10	42.8°	4.32	153°	5.62
12	41.8°	4.47	163°	6.25
14	41.6°	4.52	180°	6.78
16	42°	4.5	180°	7.16
20	42.9°	4.46	180°	7.96

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