Echo: ORC Rating

GPH

686.7

OSN

668.1

LOA

10.868 m

Displacement

7500 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5932

Medium

0.7925

High

0.9185

Triple Offshore

Low

0.7629

Medium

0.9858

High

1.1013

Boat Specifications

Dimensions

Length overall: 10.868 m
Beam: 3.25 m
Draft: 2 m
Displacement: 7500 kg
Crew weight: 450 kg
Wetted surface: 27.13 m²

Sails

Mainsail: 32.28 m²
Genoa: 33.01 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 90.96 m²

Design

Type: Impala 36
Builder: Fordewerft + M&P Y
Designer: Bjorn Jensen
Year built: 1974

Performance data

Polar CSV

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

6,42.4,4.18441,52,4.69,60,4.94,75,5.13,90,5.16,110,5.25,120,5.09,135,4.61,146,4.113203,150,3.94
8,40.5,4.852671,52,5.48,60,5.75,75,5.98,90,6.16,110,6.3,120,6.15,135,5.61,148,4.999716,150,4.89
10,40.5,5.44446,52,6.14,60,6.38,75,6.56,90,6.77,110,6.87,120,6.8,135,6.48,146.5,5.948057,150,5.72
12,40.9,5.940305,52,6.53,60,6.71,75,6.85,90,7.01,110,7.18,120,7.13,135,6.93,148,6.497273,150,6.36
14,40.3,6.162574,52,6.73,60,6.89,75,7.05,90,7.12,110,7.44,120,7.42,135,7.22,150,6.74,174,5.912389
16,39.6,6.229614,52,6.83,60,7.01,75,7.2,90,7.28,110,7.63,120,7.71,135,7.51,150,7,176,6.455726
20,39.4,6.263478,52,6.89,60,7.1,75,7.42,90,7.62,110,7.89,120,8.17,135,8.1,150,7.43,178.5,7.052417

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.69	4.94	5.13	5.16	5.25	5.09	4.61	3.94
8	5.48	5.75	5.98	6.16	6.3	6.15	5.61	4.89
10	6.14	6.38	6.56	6.77	6.87	6.8	6.48	5.72
12	6.53	6.71	6.85	7.01	7.18	7.13	6.93	6.36
14	6.73	6.89	7.05	7.12	7.44	7.42	7.22	6.74
16	6.83	7.01	7.2	7.28	7.63	7.71	7.51	7
20	6.89	7.1	7.42	7.62	7.89	8.17	8.1	7.43

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.4°	3.09	146°	3.41
8	40.5°	3.69	148°	4.24
10	40.5°	4.14	146.5°	4.96
12	40.9°	4.49	148°	5.51
14	40.3°	4.7	174°	5.88
16	39.6°	4.8	176°	6.44
20	39.4°	4.84	178.5°	7.05

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°	4.69	5.48	6.14	6.53	6.73	6.83	6.89
60°	4.94	5.75	6.38	6.71	6.89	7.01	7.10
75°	5.13	5.98	6.56	6.85	7.05	7.20	7.42
90°	5.16	6.16	6.77	7.01	7.12	7.28	7.62
110°	5.25	6.30	6.87	7.18	7.44	7.63	7.89
120°	5.09	6.15	6.80	7.13	7.42	7.71	8.17
135°	4.61	5.61	6.48	6.93	7.22	7.51	8.10
150°	3.94	4.89	5.72	6.36	6.74	7.00	7.43