GATTAMELATA — ORC Rating

GPH

741.9

OSN

722.5

LOA

7.7 m

Displacement

1750 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6436

Medium

0.8449

High

0.9316

Triple Offshore

Low

0.8158

Medium

1.0178

High

1.1092

Boat Specifications

Dimensions

Length overall: 7.7 m
Beam: 2.71 m
Draft: 1.5 m
Displacement: 1750 kg
Crew weight: 335 kg
Wetted surface: 12.83 m²

Sails

Mainsail: 15.85 m²
Genoa: 22.17 m²
Spinnaker: 48.93 m²
Asymmetric spinnaker: 0 m²

Design

Type: COMET 770
Builder: COMAR
Designer: FINOT
Year built: 1974

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.

6,41.4,4.02607,52,4.52,60,4.73,75,4.89,90,4.84,110,4.87,120,4.74,135,4.34,148.8,3.811242,150,3.76
8,41,4.730296,52,5.26,60,5.42,75,5.52,90,5.57,110,5.65,120,5.58,135,5.27,150,4.67,151.5,4.608467
10,39.4,5.150546,52,5.62,60,5.73,75,5.83,90,5.94,110,6.05,120,5.99,135,5.79,150,5.42,155.9,5.192619
12,38.7,5.304765,52,5.79,60,5.92,75,6.07,90,6.16,110,6.42,120,6.37,135,6.14,150,5.84,180,5.35
14,38.6,5.348548,52,5.85,60,6.03,75,6.27,90,6.36,110,6.72,120,6.73,135,6.51,150,6.17,180,5.77
16,39.1,5.37339,52,5.87,60,6.07,75,6.41,90,6.59,110,6.9,120,7.03,135,6.85,150,6.5,180,6.09
20,40.4,5.344446,52,5.83,60,6.07,75,6.49,90,6.86,110,7.14,120,7.41,135,7.48,150,7.12,180,6.71

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.52	4.73	4.89	4.84	4.87	4.74	4.34	3.76
8	5.26	5.42	5.52	5.57	5.65	5.58	5.27	4.67
10	5.62	5.73	5.83	5.94	6.05	5.99	5.79	5.42
12	5.79	5.92	6.07	6.16	6.42	6.37	6.14	5.84
14	5.85	6.03	6.27	6.36	6.72	6.73	6.51	6.17
16	5.87	6.07	6.41	6.59	6.9	7.03	6.85	6.5
20	5.83	6.07	6.49	6.86	7.14	7.41	7.48	7.12

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	41.4°	3.02	148.8°	3.26
8	41°	3.57	151.5°	4.05
10	39.4°	3.98	155.9°	4.74
12	38.7°	4.14	180°	5.35
14	38.6°	4.18	180°	5.77
16	39.1°	4.17	180°	6.09
20	40.4°	4.07	180°	6.71

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