SIRIUS IV — ORC Rating

GPH

582.8

OSN

566.7

LOA

12.013 m

Displacement

6167 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7929

Medium

1.067

High

1.2292

Triple Offshore

Low

1.0189

Medium

1.3024

High

1.4608

Boat Specifications

Dimensions

Length overall: 12.013 m
Beam: 3.94 m
Draft: 2.74 m
Displacement: 6167 kg
Crew weight: 850 kg
Wetted surface: 26.89 m²

Sails

Mainsail: 51.75 m²
Genoa: 39.3 m²
Spinnaker: 90.62 m²
Asymmetric spinnaker: 0 m²

Design

Type: PROTO IOR ONE TON
Builder: BARRACUDA
Designer: B. FARR
Year built: 1984

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.

6,40.7,5.183778,52,5.85,60,6.13,75,6.34,90,6.22,110,5.93,120,5.73,135,5.16,144.5,4.606226,150,4.33
8,40.3,6.175686,52,6.92,60,7.13,75,7.26,90,7.19,110,7.13,120,6.95,135,6.33,149.5,5.454783,150,5.42
10,38.3,6.702546,52,7.4,60,7.56,75,7.69,90,7.66,110,7.73,120,7.61,135,7.23,150,6.43,150.2,6.418785
12,37.1,6.920902,52,7.63,60,7.8,75,7.99,90,8,110,8.17,120,8.06,135,7.73,150,7.24,156.8,6.908667
14,36.4,7.01956,52,7.74,60,7.96,75,8.25,90,8.33,110,8.61,120,8.54,135,8.16,150,7.71,173.8,7.051243
16,36,7.057948,52,7.81,60,8.05,75,8.44,90,8.63,110,8.97,120,9,135,8.62,150,8.11,180,7.54
20,35.6,7.133187,52,7.87,60,8.14,75,8.64,90,9.07,110,9.43,120,9.88,135,9.64,150,8.98,180,8.33

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.85	6.13	6.34	6.22	5.93	5.73	5.16	4.33
8	6.92	7.13	7.26	7.19	7.13	6.95	6.33	5.42
10	7.4	7.56	7.69	7.66	7.73	7.61	7.23	6.43
12	7.63	7.8	7.99	8	8.17	8.06	7.73	7.24
14	7.74	7.96	8.25	8.33	8.61	8.54	8.16	7.71
16	7.81	8.05	8.44	8.63	8.97	9	8.62	8.11
20	7.87	8.14	8.64	9.07	9.43	9.88	9.64	8.98

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	40.7°	3.93	144.5°	3.75
8	40.3°	4.71	149.5°	4.7
10	38.3°	5.26	150.2°	5.57
12	37.1°	5.52	156.8°	6.35
14	36.4°	5.65	173.8°	7.01
16	36°	5.71	180°	7.54
20	35.6°	5.8	180°	8.33

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