ADDY: ORC Rating

GPH

670.6

OSN

653.4

LOA

10.25 m

Displacement

5307 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6152

Medium

0.823

High

0.937

Triple Offshore

Low

0.7904

Medium

1.0064

High

1.1115

Boat Specifications

Dimensions

Length overall: 10.25 m
Beam: 3.3 m
Draft: 2 m
Displacement: 5307 kg
Crew weight: 506 kg
Wetted surface: 24.48 m²

Sails

Mainsail: 33.17 m²
Genoa: 36.79 m²
Spinnaker: 73.16 m²
Asymmetric spinnaker: 0 m²

Design

Type: v.d. Stadt 34
Builder: H.J. Bouma
Designer: v.d. Stadt
Year built: 2000

Performance data

Polar CSV

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

6,41.6,4.466446,52,5.02,60,5.27,75,5.48,90,5.42,110,5.25,120,5.08,135,4.61,147,4.030188,150,3.9
8,40.5,5.207745,52,5.9,60,6.14,75,6.3,90,6.3,110,6.3,120,6.15,135,5.6,150,4.9,152,4.802097
10,40.7,5.830101,52,6.4,60,6.56,75,6.69,90,6.74,110,6.81,120,6.73,135,6.42,150,5.77,152,5.674176
12,39.4,6.004657,52,6.61,60,6.77,75,6.92,90,6.98,110,7.14,120,7.07,135,6.84,150,6.47,160,6.087097
14,39,6.086373,52,6.69,60,6.86,75,7.08,90,7.19,110,7.45,120,7.41,135,7.17,150,6.85,180,6.34
16,39,6.137843,52,6.72,60,6.91,75,7.19,90,7.39,110,7.69,120,7.75,135,7.51,150,7.15,180,6.76
20,39,6.150711,52,6.73,60,6.93,75,7.28,90,7.67,110,7.97,120,8.24,135,8.18,150,7.8,180,7.36

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.02	5.27	5.48	5.42	5.25	5.08	4.61	3.9
8	5.9	6.14	6.3	6.3	6.3	6.15	5.6	4.9
10	6.4	6.56	6.69	6.74	6.81	6.73	6.42	5.77
12	6.61	6.77	6.92	6.98	7.14	7.07	6.84	6.47
14	6.69	6.86	7.08	7.19	7.45	7.41	7.17	6.85
16	6.72	6.91	7.19	7.39	7.69	7.75	7.51	7.15
20	6.73	6.93	7.28	7.67	7.97	8.24	8.18	7.8

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	41.6°	3.34	147°	3.38
8	40.5°	3.96	152°	4.24
10	40.7°	4.42	152°	5.01
12	39.4°	4.64	160°	5.72
14	39°	4.73	180°	6.34
16	39°	4.77	180°	6.76
20	39°	4.78	180°	7.36

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°	5.02	5.90	6.40	6.61	6.69	6.72	6.73
60°	5.27	6.14	6.56	6.77	6.86	6.91	6.93
75°	5.48	6.30	6.69	6.92	7.08	7.19	7.28
90°	5.42	6.30	6.74	6.98	7.19	7.39	7.67
110°	5.25	6.30	6.81	7.14	7.45	7.69	7.97
120°	5.08	6.15	6.73	7.07	7.41	7.75	8.24
135°	4.61	5.60	6.42	6.84	7.17	7.51	8.18
150°	3.90	4.90	5.77	6.47	6.85	7.15	7.80