ALTOPANA — ORC Rating

GPH

664.5

OSN

644.5

LOA

9.61 m

Displacement

3692 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6048

Medium

0.8304

High

0.9565

Triple Offshore

Low

0.7822

Medium

1.0225

High

1.1488

Boat Specifications

Dimensions

Length overall: 9.61 m
Beam: 3.21 m
Draft: 1.93 m
Displacement: 3692 kg
Crew weight: 550 kg
Wetted surface: 21.96 m²

Sails

Mainsail: 24.99 m²
Genoa: 31.17 m²
Spinnaker: 61.05 m²
Asymmetric spinnaker: 0 m²

Design

Type: First 31.7
Builder: Beneteau
Designer: Finot
Year built: 1998

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.

6,42.8,4.415794,52,4.96,60,5.25,75,5.47,90,5.4,110,5.2,120,5.04,135,4.55,146,4.004644,150,3.84
8,41.2,5.196601,52,5.87,60,6.16,75,6.37,90,6.36,110,6.33,120,6.16,135,5.61,150,4.884383
10,40.5,5.838986,52,6.48,60,6.67,75,6.82,90,6.85,110,6.94,120,6.86,135,6.49,150,5.78,152,5.685502
12,39.2,6.142375,52,6.77,60,6.93,75,7.09,90,7.17,110,7.33,120,7.26,135,6.98,150,6.54,157,6.224845
14,38.4,6.214164,52,6.87,60,7.07,75,7.31,90,7.41,110,7.74,120,7.67,135,7.36,150,6.98,180,6.36
16,38.2,6.247957,52,6.92,60,7.13,75,7.47,90,7.68,110,8.12,120,8.12,135,7.79,150,7.33,180,6.85
20,39,6.266519,52,6.93,60,7.15,75,7.59,90,8.11,110,8.57,120,9.02,135,8.77,150,8.14,180,7.54

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.96	5.25	5.47	5.4	5.2	5.04	4.55	3.84
8	5.87	6.16	6.37	6.36	6.33	6.16	5.61	4.88
10	6.48	6.67	6.82	6.85	6.94	6.86	6.49	5.78
12	6.77	6.93	7.09	7.17	7.33	7.26	6.98	6.54
14	6.87	7.07	7.31	7.41	7.74	7.67	7.36	6.98
16	6.92	7.13	7.47	7.68	8.12	8.12	7.79	7.33
20	6.93	7.15	7.59	8.11	8.57	9.02	8.77	8.14

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	3.24	146°	3.32
8	41.2°	3.91	150°	4.23
10	40.5°	4.44	152°	5.02
12	39.2°	4.76	157°	5.73
14	38.4°	4.87	180°	6.36
16	38.2°	4.91	180°	6.85
20	39°	4.87	180°	7.54

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