AHI — ORC Rating | RegattaPages

GPH

703.7

OSN

684.1

LOA

7.927 m

Displacement

1761 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5837

Medium

0.787

High

0.8867

Triple Offshore

Low

0.7505

Medium

0.9597

High

1.0687

Boat Specifications

Dimensions

Length overall: 7.927 m
Beam: 2.86 m
Draft: 1.38 m
Displacement: 1761 kg
Crew weight: 320 kg
Wetted surface: 14.37 m²

Sails

Mainsail: 21.13 m²
Genoa: 17.04 m²
Spinnaker: 39.35 m²
Asymmetric spinnaker: 0 m²

Design

Type: X-79
Builder: X-Yachts
Designer: Jeppesen
Year built: 1979

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.

6,42.4,4.197952,52,4.7,60,4.99,75,5.19,90,5.12,110,5.09,120,4.91,135,4.41,148,3.83233,150,3.75
8,41.6,4.987977,52,5.57,60,5.78,75,5.93,90,5.98,110,6,120,5.87,135,5.41,150,4.74,151.5,4.665362
10,40.1,5.49076,52,6.02,60,6.16,75,6.28,90,6.42,110,6.47,120,6.37,135,6.09,150,5.57,154,5.407245
12,39,5.661742,52,6.22,60,6.39,75,6.58,90,6.71,110,6.92,120,6.81,135,6.49,150,6.14,170,5.625463
14,38.8,5.735637,52,6.29,60,6.5,75,6.82,90,6.94,110,7.34,120,7.25,135,6.92,150,6.52,180,6.08
16,39,5.764683,52,6.32,60,6.55,75,6.96,90,7.22,110,7.68,120,7.73,135,7.35,150,6.92,180,6.44
20,40.1,5.791445,52,6.33,60,6.56,75,7.06,90,7.57,110,8.15,120,8.73,135,8.44,150,7.75,180,7.2

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.7	4.99	5.19	5.12	5.09	4.91	4.41	3.75
8	5.57	5.78	5.93	5.98	6	5.87	5.41	4.74
10	6.02	6.16	6.28	6.42	6.47	6.37	6.09	5.57
12	6.22	6.39	6.58	6.71	6.92	6.81	6.49	6.14
14	6.29	6.5	6.82	6.94	7.34	7.25	6.92	6.52
16	6.32	6.55	6.96	7.22	7.68	7.73	7.35	6.92
20	6.33	6.56	7.06	7.57	8.15	8.73	8.44	7.75

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.4°	3.1	148°	3.25
8	41.6°	3.73	151.5°	4.1
10	40.1°	4.2	154°	4.86
12	39°	4.4	170°	5.54
14	38.8°	4.47	180°	6.08
16	39°	4.48	180°	6.44
20	40.1°	4.43	180°	7.2

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