ALMA GEMEA: ORC Rating

GPH

638.4

OSN

619.2

LOA

11.9 m

Displacement

8850 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6196

Medium

0.8507

High

1.005

Triple Offshore

Low

0.8046

Medium

1.0672

High

1.2162

Boat Specifications

Dimensions

Length overall: 11.9 m
Beam: 3.98 m
Draft: 2.07 m
Displacement: 8850 kg
Crew weight: 640 kg
Wetted surface: 33.42 m²

Sails

Mainsail: 36.57 m²
Genoa: 39.56 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 110.32 m²

Design

Type: DUFOUR 405 GL
Builder: DUFOUR YACHTS
Designer: UMBERTO FELCI
Year built: 2008

Performance data

Polar CSV

Each row is TWS followed by TWA and boat-speed pairs. Paste it directly into Offwind or compatible navigation software.

6,44.2,4.407802,52,4.92,60,5.24,75,5.49,90,5.51,110,5.6,120,5.44,135,4.89,145,4.382581,150,4.14
8,42,5.180686,52,5.84,60,6.17,75,6.45,90,6.63,110,6.78,120,6.6,135,6.02,148,5.329886,150,5.22
10,41.6,5.843823,52,6.58,60,6.9,75,7.14,90,7.4,110,7.51,120,7.4,135,6.98,147,6.331449,150,6.13
12,41.2,6.419331,52,7.12,60,7.34,75,7.52,90,7.78,110,7.9,120,7.83,135,7.56,148,7.027903,150,6.89
14,40.1,6.745791,52,7.41,60,7.6,75,7.76,90,7.97,110,8.23,120,8.17,135,7.92,150,7.355442
16,39.4,6.88465,52,7.57,60,7.76,75,7.96,90,8.07,110,8.56,120,8.54,135,8.25,150,7.67,174.5,6.881682
20,39,6.909899,52,7.65,60,7.88,75,8.25,90,8.46,110,8.99,120,9.3,135,9.01,150,8.16,178,7.674675

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.92	5.24	5.49	5.51	5.6	5.44	4.89	4.14
8	5.84	6.17	6.45	6.63	6.78	6.6	6.02	5.22
10	6.58	6.9	7.14	7.4	7.51	7.4	6.98	6.13
12	7.12	7.34	7.52	7.78	7.9	7.83	7.56	6.89
14	7.41	7.6	7.76	7.97	8.23	8.17	7.92	7.36
16	7.57	7.76	7.96	8.07	8.56	8.54	8.25	7.67
20	7.65	7.88	8.25	8.46	8.99	9.3	9.01	8.16

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44.2°	3.16	145°	3.59
8	42°	3.85	148°	4.52
10	41.6°	4.37	147°	5.31
12	41.2°	4.83	148°	5.96
14	40.1°	5.16	150°	6.37
16	39.4°	5.32	174.5°	6.85
20	39°	5.37	178°	7.67

VPP POLAR · BOAT SPEED BY TWAKT

TRUE WIND ANGLE —

READ AT ANGLE

Hover or tap the chart, or use the slider, to read boat speeds.

True wind speed 6 kt8 kt10 kt12 kt14 kt16 kt20 kt

Data table

Boat speed by true wind angle and true wind speed
TWA	Boat speed in 6 kt (kt)	Boat speed in 8 kt (kt)	Boat speed in 10 kt (kt)	Boat speed in 12 kt (kt)	Boat speed in 14 kt (kt)	Boat speed in 16 kt (kt)	Boat speed in 20 kt (kt)
0°	0.00	0.00	0.00	0.00	0.00	0.00	0.00
52°	4.92	5.84	6.58	7.12	7.41	7.57	7.65
60°	5.24	6.17	6.90	7.34	7.60	7.76	7.88
75°	5.49	6.45	7.14	7.52	7.76	7.96	8.25
90°	5.51	6.63	7.40	7.78	7.97	8.07	8.46
110°	5.60	6.78	7.51	7.90	8.23	8.56	8.99
120°	5.44	6.60	7.40	7.83	8.17	8.54	9.30
135°	4.89	6.02	6.98	7.56	7.92	8.25	9.01
150°	4.14	5.22	6.13	6.89	7.36	7.67	8.16