HARA — ORC Rating | RegattaPages

GPH

797.1

OSN

771.2

LOA

9.45 m

Displacement

5123 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5484

Medium

0.7617

High

0.9082

Triple Offshore

Low

0.7148

Medium

0.9656

High

1.1126

Boat Specifications

Dimensions

Length overall: 9.45 m
Beam: 3.23 m
Draft: 1.39 m
Displacement: 5123 kg
Crew weight: 320 kg
Wetted surface: 23.5 m²

Sails

Mainsail: 17.94 m²
Genoa: 31.12 m²
Spinnaker: 56.19 m²
Asymmetric spinnaker: 0 m²

Design

Type: ROBERTS 310
Builder: OWNER
Designer: BRUCE ROBERTS
Year built: 1991

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.

6,48,3.556854,52,3.81,60,4.16,75,4.41,90,4.36,110,4.45,120,4.33,135,3.94,148,3.466785,150,3.39
8,46.2,4.21878,52,4.6,60,4.93,75,5.2,90,5.25,110,5.42,120,5.3,135,4.9,150,4.35,151.2,4.302147
10,45.3,4.705751,52,5.16,60,5.52,75,5.85,90,6.02,110,6.2,120,6.11,135,5.72,150,5.13,155.3,4.920154
12,45.3,5.132254,52,5.63,60,5.99,75,6.27,90,6.46,110,6.6,120,6.56,135,6.33,150,5.85,158.9,5.46651
14,45.9,5.532302,52,5.99,60,6.28,75,6.5,90,6.69,110,6.87,120,6.84,135,6.67,150,6.36,174.3,5.758472
16,46,5.715039,52,6.14,60,6.42,75,6.66,90,6.79,110,7.13,120,7.11,135,6.94,150,6.66,180,6.25
20,46.4,5.727796,52,6.15,60,6.48,75,6.84,90,7.06,110,7.55,120,7.69,135,7.53,150,7.18,180,6.83

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	3.81	4.16	4.41	4.36	4.45	4.33	3.94	3.39
8	4.6	4.93	5.2	5.25	5.42	5.3	4.9	4.35
10	5.16	5.52	5.85	6.02	6.2	6.11	5.72	5.13
12	5.63	5.99	6.27	6.46	6.6	6.56	6.33	5.85
14	5.99	6.28	6.5	6.69	6.87	6.84	6.67	6.36
16	6.14	6.42	6.66	6.79	7.13	7.11	6.94	6.66
20	6.15	6.48	6.84	7.06	7.55	7.69	7.53	7.18

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	48°	2.38	148°	2.94
8	46.2°	2.92	151.2°	3.77
10	45.3°	3.31	155.3°	4.47
12	45.3°	3.61	158.9°	5.1
14	45.9°	3.85	174.3°	5.73
16	46°	3.97	180°	6.25
20	46.4°	3.95	180°	6.83

Loading polar chart…