U 47: ORC Rating

GPH

583.8

OSN

565.3

LOA

12.487 m

Displacement

6309 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.766

Medium

1.0611

High

1.2303

Triple Offshore

Low

0.9921

Medium

1.3145

High

1.4862

Boat Specifications

Dimensions

Length overall: 12.487 m
Beam: 3.64 m
Draft: 2.51 m
Displacement: 6309 kg
Crew weight: 700 kg
Wetted surface: 31.9 m²

Sails

Mainsail: 45.94 m²
Genoa: 37.87 m²
Spinnaker: 104.27 m²
Asymmetric spinnaker: 0 m²

Design

Type: NAUTATEC 42
Builder: ESTARELLAS
Designer: nautatec
Year built: 2001

Performance data

Polar CSV

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

6,42.7,4.912135,52,5.51,60,5.82,75,6.08,90,5.99,110,5.91,120,5.73,135,5.15,143.8,4.634677,150,4.32
8,41.5,5.928254,52,6.67,60,7,75,7.23,90,7.18,110,7.27,120,7.09,135,6.44,147.3,5.656493,150,5.5
10,40.7,6.71385,52,7.44,60,7.66,75,7.82,90,7.87,110,8,120,7.89,135,7.47,149.5,6.592163,150,6.56
12,39.1,6.984118,52,7.75,60,7.96,75,8.17,90,8.2,110,8.49,120,8.41,135,8.04,150,7.44,154,7.231913
14,38.9,7.105748,52,7.85,60,8.09,75,8.43,90,8.56,110,8.91,120,8.98,135,8.53,150,8.01,162.8,7.484729
16,38.8,7.159923,52,7.9,60,8.15,75,8.59,90,8.91,110,9.18,120,9.55,135,9.1,150,8.46,180,7.75
20,38.4,7.298772,52,8.02,60,8.26,75,8.72,90,9.39,110,9.74,120,10.3,135,10.47,150,9.52,180,8.64

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.51	5.82	6.08	5.99	5.91	5.73	5.15	4.32
8	6.67	7	7.23	7.18	7.27	7.09	6.44	5.5
10	7.44	7.66	7.82	7.87	8	7.89	7.47	6.56
12	7.75	7.96	8.17	8.2	8.49	8.41	8.04	7.44
14	7.85	8.09	8.43	8.56	8.91	8.98	8.53	8.01
16	7.9	8.15	8.59	8.91	9.18	9.55	9.1	8.46
20	8.02	8.26	8.72	9.39	9.74	10.3	10.47	9.52

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.7°	3.61	143.8°	3.74
8	41.5°	4.44	147.3°	4.76
10	40.7°	5.09	149.5°	5.68
12	39.1°	5.42	154°	6.5
14	38.9°	5.53	162.8°	7.15
16	38.8°	5.58	180°	7.75
20	38.4°	5.72	180°	8.64

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°	5.51	6.67	7.44	7.75	7.85	7.90	8.02
60°	5.82	7.00	7.66	7.96	8.09	8.15	8.26
75°	6.08	7.23	7.82	8.17	8.43	8.59	8.72
90°	5.99	7.18	7.87	8.20	8.56	8.91	9.39
110°	5.91	7.27	8.00	8.49	8.91	9.18	9.74
120°	5.73	7.09	7.89	8.41	8.98	9.55	10.30
135°	5.15	6.44	7.47	8.04	8.53	9.10	10.47
150°	4.32	5.50	6.56	7.44	8.01	8.46	9.52