De Wiekslag: ORC Rating

GPH

737.9

OSN

709.1

LOA

9.253 m

Displacement

2381 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5916

Medium

0.8481

High

0.9951

Triple Offshore

Low

0.7633

Medium

1.0514

High

1.1942

Boat Specifications

Dimensions

Length overall: 9.253 m
Beam: 2.12 m
Draft: 1.93 m
Displacement: 2381 kg
Crew weight: 532 kg
Wetted surface: 17.38 m²

Sails

Mainsail: 14.41 m²
Genoa: 23.33 m²
Spinnaker: 42.4 m²
Asymmetric spinnaker: 0 m²

Design

Type: Zeeslang
Builder: -
Designer: Stadt v/d
Year built: 1960

Performance data

Polar CSV

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

6,42.5,3.77063,52,4.22,60,4.45,75,4.62,90,4.54,110,4.52,120,4.37,135,3.85,147.5,3.391071,150,3.3
8,41,4.584545,52,5.16,60,5.41,75,5.61,90,5.54,110,5.64,120,5.49,135,4.95,150,4.295486
10,40.5,5.260348,52,5.92,60,6.13,75,6.28,90,6.31,110,6.42,120,6.32,135,5.95,149.6,5.228903,150,5.21
12,40,5.678522,52,6.28,60,6.45,75,6.6,90,6.63,110,6.82,120,6.75,135,6.52,150,6.02,154.3,5.837459
14,39.1,5.772851,52,6.39,60,6.57,75,6.79,90,6.88,110,7.13,120,7.12,135,6.87,150,6.53,170,5.960554
16,38.6,5.809189,52,6.43,60,6.62,75,6.89,90,7.1,110,7.4,120,7.54,135,7.24,150,6.85,180,6.38
20,39.2,5.793963,52,6.43,60,6.64,75,6.97,90,7.39,110,7.77,120,8.23,135,8.22,150,7.59,180,7.02

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.22	4.45	4.62	4.54	4.52	4.37	3.85	3.3
8	5.16	5.41	5.61	5.54	5.64	5.49	4.95	4.29
10	5.92	6.13	6.28	6.31	6.42	6.32	5.95	5.21
12	6.28	6.45	6.6	6.63	6.82	6.75	6.52	6.02
14	6.39	6.57	6.79	6.88	7.13	7.12	6.87	6.53
16	6.43	6.62	6.89	7.1	7.4	7.54	7.24	6.85
20	6.43	6.64	6.97	7.39	7.77	8.23	8.22	7.59

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.5°	2.78	147.5°	2.86
8	41°	3.46	150°	3.72
10	40.5°	4	149.6°	4.51
12	40°	4.35	154.3°	5.26
14	39.1°	4.48	170°	5.87
16	38.6°	4.54	180°	6.38
20	39.2°	4.49	180°	7.02

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°	4.22	5.16	5.92	6.28	6.39	6.43	6.43
60°	4.45	5.41	6.13	6.45	6.57	6.62	6.64
75°	4.62	5.61	6.28	6.60	6.79	6.89	6.97
90°	4.54	5.54	6.31	6.63	6.88	7.10	7.39
110°	4.52	5.64	6.42	6.82	7.13	7.40	7.77
120°	4.37	5.49	6.32	6.75	7.12	7.54	8.23
135°	3.85	4.95	5.95	6.52	6.87	7.24	8.22
150°	3.30	4.29	5.21	6.02	6.53	6.85	7.59