X ALTAIR: ORC Rating

GPH

581.6

OSN

565.4

LOA

12.1 m

Displacement

6369 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7145

Medium

0.9454

High

1.0719

Triple Offshore

Low

0.9136

Medium

1.1592

High

1.2855

Boat Specifications

Dimensions

Length overall: 12.1 m
Beam: 3.78 m
Draft: 2.4 m
Displacement: 6369 kg
Crew weight: 650 kg
Wetted surface: 30.32 m²

Sails

Mainsail: 50.2 m²
Genoa: 39.07 m²
Spinnaker: 108.38 m²
Asymmetric spinnaker: 125.17 m²

Design

Type: IMX 40
Builder: X Yachts
Designer: Jeppesen
Year built: 2000
Stability index: 122.5

Performance data

Polar CSV

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

6,42,5.153773,52,5.77,60,6.04,75,6.22,90,6.09,110,6.11,120,5.95,135,5.36,143.4,4.89526,150,4.53
8,40.2,6.07492,52,6.78,60,7,75,7.14,90,7.15,110,7.27,120,7.14,135,6.61,147.3,5.894161,150,5.72
10,38.8,6.58251,52,7.31,60,7.5,75,7.63,90,7.67,110,7.89,120,7.82,135,7.47,149.2,6.775636,150,6.72
12,37.8,6.758168,52,7.53,60,7.73,75,7.94,90,7.98,110,8.32,120,8.32,135,8.02,150,7.42,156.8,7.006585
14,37.5,6.85697,52,7.64,60,7.85,75,8.15,90,8.29,110,8.64,120,8.8,135,8.53,150,7.86,166.4,7.273954
16,37.6,6.941906,52,7.7,60,7.93,75,8.28,90,8.55,110,8.89,120,9.24,135,9.06,150,8.31,176.3,7.625895
20,38.1,7.014556,52,7.75,60,8,75,8.44,90,8.9,110,9.34,120,9.91,135,10.39,150,9.28,177.2,8.480124

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.77	6.04	6.22	6.09	6.11	5.95	5.36	4.53
8	6.78	7	7.14	7.15	7.27	7.14	6.61	5.72
10	7.31	7.5	7.63	7.67	7.89	7.82	7.47	6.72
12	7.53	7.73	7.94	7.98	8.32	8.32	8.02	7.42
14	7.64	7.85	8.15	8.29	8.64	8.8	8.53	7.86
16	7.7	7.93	8.28	8.55	8.89	9.24	9.06	8.31
20	7.75	8	8.44	8.9	9.34	9.91	10.39	9.28

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42°	3.83	143.4°	3.93
8	40.2°	4.64	147.3°	4.96
10	38.8°	5.13	149.2°	5.82
12	37.8°	5.34	156.8°	6.44
14	37.5°	5.44	166.4°	7.07
16	37.6°	5.5	176.3°	7.61
20	38.1°	5.52	177.2°	8.47

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°	5.77	6.78	7.31	7.53	7.64	7.70	7.75
60°	6.04	7.00	7.50	7.73	7.85	7.93	8.00
75°	6.22	7.14	7.63	7.94	8.15	8.28	8.44
90°	6.09	7.15	7.67	7.98	8.29	8.55	8.90
110°	6.11	7.27	7.89	8.32	8.64	8.89	9.34
120°	5.95	7.14	7.82	8.32	8.80	9.24	9.91
135°	5.36	6.61	7.47	8.02	8.53	9.06	10.39
150°	4.53	5.72	6.72	7.42	7.86	8.31	9.28