Fatmai — ORC Rating | RegattaPages

GPH

698.6

OSN

681

LOA

10.5 m

Displacement

3700 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5921

Medium

0.7866

High

0.8921

Triple Offshore

Low

0.7597

Medium

0.967

High

1.0618

Boat Specifications

Dimensions

Length overall: 10.5 m
Beam: 2.3 m
Draft: 1.6 m
Displacement: 3700 kg
Crew weight: 460 kg
Wetted surface: 19.01 m²

Sails

Mainsail: 20.99 m²
Genoa: 28.61 m²
Spinnaker: 64.41 m²
Asymmetric spinnaker: 0 m²

Design

Type: Botnia 6
Builder: Tyvex
Designer: G. L. Stenback
Year built: 1970

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.

6,42,4.198374,52,4.72,60,4.98,75,5.19,90,5.09,110,5.1,120,4.94,135,4.49,147,3.994417,150,3.86
8,40.9,4.934819,52,5.6,60,5.86,75,6.06,90,6.03,110,6.16,120,6.06,135,5.56,150,4.83,151,4.77922
10,41.6,5.496136,52,6.1,60,6.31,75,6.47,90,6.48,110,6.64,120,6.6,135,6.36,150,5.75,150.5,5.721799
12,40.9,5.688933,52,6.29,60,6.5,75,6.69,90,6.73,110,6.9,120,6.94,135,6.75,150,6.4,159,6.062681
14,40.5,5.773232,52,6.38,60,6.58,75,6.83,90,6.92,110,7.06,120,7.23,135,7.08,150,6.75,180,6.24
16,40.5,5.825835,52,6.42,60,6.63,75,6.91,90,7.09,110,7.19,120,7.44,135,7.42,150,7.06,180,6.63
20,40.3,5.887225,52,6.45,60,6.66,75,6.99,90,7.32,110,7.41,120,7.73,135,8.07,150,7.71,180,7.23

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.72	4.98	5.19	5.09	5.1	4.94	4.49	3.86
8	5.6	5.86	6.06	6.03	6.16	6.06	5.56	4.83
10	6.1	6.31	6.47	6.48	6.64	6.6	6.36	5.75
12	6.29	6.5	6.69	6.73	6.9	6.94	6.75	6.4
14	6.38	6.58	6.83	6.92	7.06	7.23	7.08	6.75
16	6.42	6.63	6.91	7.09	7.19	7.44	7.42	7.06
20	6.45	6.66	6.99	7.32	7.41	7.73	8.07	7.71

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42°	3.12	147°	3.35
8	40.9°	3.73	151°	4.18
10	41.6°	4.11	150.5°	4.98
12	40.9°	4.3	159°	5.66
14	40.5°	4.39	180°	6.24
16	40.5°	4.43	180°	6.63
20	40.3°	4.49	180°	7.23

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