BLACK CAT — ORC Rating

GPH

656.5

OSN

637

LOA

9.24 m

Displacement

4173 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.618

Medium

0.8426

High

0.9691

Triple Offshore

Low

0.7972

Medium

1.0325

High

1.1552

Boat Specifications

Dimensions

Length overall: 9.24 m
Beam: 3.2 m
Draft: 1.93 m
Displacement: 4173 kg
Crew weight: 581 kg
Wetted surface: 22.74 m²

Sails

Mainsail: 30.39 m²
Genoa: 24.36 m²
Spinnaker: 77.05 m²
Asymmetric spinnaker: 0 m²

Design

Type: Elan 310
Builder: Elan Marine
Designer: Humphreys
Year built: 2009

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.

6,43.1,4.355196,52,4.89,60,5.17,75,5.39,90,5.4,110,5.49,120,5.34,135,4.86,146,4.306198,150,4.12
8,41.2,5.103567,52,5.78,60,6.08,75,6.3,90,6.44,110,6.57,120,6.45,135,5.96,150,5.173058
10,40.9,5.768314,52,6.42,60,6.62,75,6.77,90,6.94,110,7.07,120,7.01,135,6.73,150,6.09,151.5,6.019455
12,39.6,6.125787,52,6.74,60,6.9,75,7.04,90,7.14,110,7.44,120,7.4,135,7.14,150,6.76,159,6.405447
14,39,6.240784,52,6.87,60,7.05,75,7.26,90,7.33,110,7.78,120,7.83,135,7.53,150,7.14,180,6.58
16,38.6,6.269829,52,6.92,60,7.12,75,7.42,90,7.59,110,8,120,8.26,135,7.98,150,7.5,180,7.01
20,38.6,6.333807,52,6.96,60,7.14,75,7.56,90,8.03,110,8.38,120,8.81,135,8.99,150,8.34,180,7.71

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.89	5.17	5.39	5.4	5.49	5.34	4.86	4.12
8	5.78	6.08	6.3	6.44	6.57	6.45	5.96	5.17
10	6.42	6.62	6.77	6.94	7.07	7.01	6.73	6.09
12	6.74	6.9	7.04	7.14	7.44	7.4	7.14	6.76
14	6.87	7.05	7.26	7.33	7.78	7.83	7.53	7.14
16	6.92	7.12	7.42	7.59	8	8.26	7.98	7.5
20	6.96	7.14	7.56	8.03	8.38	8.81	8.99	8.34

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.1°	3.18	146°	3.57
8	41.2°	3.84	150°	4.48
10	40.9°	4.36	151.5°	5.29
12	39.6°	4.72	159°	5.98
14	39°	4.85	180°	6.58
16	38.6°	4.9	180°	7.01
20	38.6°	4.95	180°	7.71

Loading polar chart…