Hattiwatti — ORC Rating

GPH

688.7

OSN

672.6

LOA

8.8 m

Displacement

2602 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6045

Medium

0.8019

High

0.8966

Triple Offshore

Low

0.7798

Medium

0.9758

High

1.0689

Boat Specifications

Dimensions

Length overall: 8.8 m
Beam: 2.51 m
Draft: 1.52 m
Displacement: 2602 kg
Crew weight: 409 kg
Wetted surface: 16.38 m²

Sails

Mainsail: 27.29 m²
Genoa: 23.54 m²
Spinnaker: 53.08 m²
Asymmetric spinnaker: 0 m²

Design

Type: Inferno 29
Builder: Na-Boats
Designer: Håkan Södergren
Year built: 1981

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.

6,42.8,4.429423,52,4.94,60,5.22,75,5.46,90,5.41,110,5.29,120,5.11,135,4.6,147,3.97057,150,3.85
8,41.2,5.17002,52,5.79,60,5.99,75,6.13,90,6.15,110,6.2,120,6.09,135,5.62,150,4.85,151.5,4.779151
10,40.5,5.628572,52,6.15,60,6.3,75,6.43,90,6.49,110,6.6,120,6.54,135,6.3,150,5.75,152,5.651525
12,39.2,5.703634,52,6.26,60,6.42,75,6.62,90,6.72,110,6.96,120,6.91,135,6.66,150,6.34,166,5.874498
14,39,5.764683,52,6.31,60,6.49,75,6.76,90,6.96,110,7.27,120,7.32,135,7.05,150,6.68,180,6.25
16,39,5.764683,52,6.34,60,6.51,75,6.83,90,7.16,110,7.47,120,7.71,135,7.48,150,7.04,180,6.59
20,39.8,5.818165,52,6.37,60,6.56,75,6.88,90,7.36,110,7.8,120,8.18,135,8.41,150,7.87,180,7.31

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.94	5.22	5.46	5.41	5.29	5.11	4.6	3.85
8	5.79	5.99	6.13	6.15	6.2	6.09	5.62	4.85
10	6.15	6.3	6.43	6.49	6.6	6.54	6.3	5.75
12	6.26	6.42	6.62	6.72	6.96	6.91	6.66	6.34
14	6.31	6.49	6.76	6.96	7.27	7.32	7.05	6.68
16	6.34	6.51	6.83	7.16	7.47	7.71	7.48	7.04
20	6.37	6.56	6.88	7.36	7.8	8.18	8.41	7.87

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	3.25	147°	3.33
8	41.2°	3.89	151.5°	4.2
10	40.5°	4.28	152°	4.99
12	39.2°	4.42	166°	5.7
14	39°	4.48	180°	6.25
16	39°	4.48	180°	6.59
20	39.8°	4.47	180°	7.31

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