ITCH: ORC Rating

GPH

736.2

OSN

715.6

LOA

8.084 m

Displacement

1434 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5589

Medium

0.7516

High

0.8451

Triple Offshore

Low

0.7181

Medium

0.9183

High

1.0146

Boat Specifications

Dimensions

Length overall: 8.084 m
Beam: 2.85 m
Draft: 1.52 m
Displacement: 1434 kg
Crew weight: 307 kg
Wetted surface: 12.42 m²

Sails

Mainsail: 18.96 m²
Genoa: 16.67 m²
Spinnaker: 31.93 m²
Asymmetric spinnaker: 0 m²

Design

Type: 1/4 Ton
Builder: Broager G.
Designer: A.Mohnhaupt
Year built: 1979
Stability index: 94.2

Performance data

Polar CSV

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

6,41.8,4.051103,52,4.58,60,4.83,75,5.01,90,4.91,110,4.78,120,4.6,135,4.11,148.4,3.58096,150,3.52
8,42,4.884647,52,5.41,60,5.61,75,5.75,90,5.72,110,5.72,120,5.58,135,5.08,150,4.45,152.3,4.359643
10,40,5.299954,52,5.81,60,5.95,75,6.09,90,6.15,110,6.2,120,6.1,135,5.8,150,5.3,153.8,5.137873
12,39.4,5.43525,52,5.95,60,6.13,75,6.35,90,6.45,110,6.62,120,6.52,135,6.22,150,5.88,164.6,5.476636
14,39.3,5.479167,52,6.01,60,6.21,75,6.53,90,6.7,110,6.98,120,6.91,135,6.63,150,6.27,178.4,5.812266
16,39.4,5.499955,52,6.03,60,6.25,75,6.62,90,6.91,110,7.27,120,7.3,135,7.02,150,6.65,179,6.190943
20,40.6,5.54479,52,6.07,60,6.29,75,6.69,90,7.11,110,7.62,120,8.04,135,7.93,150,7.4,179,6.901051

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.58	4.83	5.01	4.91	4.78	4.6	4.11	3.52
8	5.41	5.61	5.75	5.72	5.72	5.58	5.08	4.45
10	5.81	5.95	6.09	6.15	6.2	6.1	5.8	5.3
12	5.95	6.13	6.35	6.45	6.62	6.52	6.22	5.88
14	6.01	6.21	6.53	6.7	6.98	6.91	6.63	6.27
16	6.03	6.25	6.62	6.91	7.27	7.3	7.02	6.65
20	6.07	6.29	6.69	7.11	7.62	8.04	7.93	7.4

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	41.8°	3.02	148.4°	3.05
8	42°	3.63	152.3°	3.86
10	40°	4.06	153.8°	4.61
12	39.4°	4.2	164.6°	5.28
14	39.3°	4.24	178.4°	5.81
16	39.4°	4.25	179°	6.19
20	40.6°	4.21	179°	6.9

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°	4.58	5.41	5.81	5.95	6.01	6.03	6.07
60°	4.83	5.61	5.95	6.13	6.21	6.25	6.29
75°	5.01	5.75	6.09	6.35	6.53	6.62	6.69
90°	4.91	5.72	6.15	6.45	6.70	6.91	7.11
110°	4.78	5.72	6.20	6.62	6.98	7.27	7.62
120°	4.60	5.58	6.10	6.52	6.91	7.30	8.04
135°	4.11	5.08	5.80	6.22	6.63	7.02	7.93
150°	3.52	4.45	5.30	5.88	6.27	6.65	7.40