Bulletproof: ORC Rating

GPH

714.3

OSN

694.3

LOA

9.43 m

Displacement

3661 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6348

Medium

0.8638

High

0.9854

Triple Offshore

Low

0.8226

Medium

1.0692

High

1.1884

Boat Specifications

Dimensions

Length overall: 9.43 m
Beam: 3.12 m
Draft: 1.51 m
Displacement: 3661 kg
Crew weight: 275 kg
Wetted surface: 20.09 m²

Sails

Mainsail: 26.44 m²
Genoa: 21.22 m²
Spinnaker: 54.3 m²
Asymmetric spinnaker: 0 m²

Design

Type: Dehler 31
Builder: Dehler
Designer: vd Stadt & prtnrs
Year built: 1985

Performance data

Polar CSV

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

6,44.4,4.030945,52,4.47,60,4.76,75,5.01,90,5.02,110,5.08,120,4.93,135,4.46,147.3,3.921518,150,3.81
8,42.8,4.715632,52,5.27,60,5.59,75,5.87,90,6,110,6.1,120,5.96,135,5.45,150,4.79,151.8,4.708934
10,42.6,5.298214,52,5.91,60,6.16,75,6.35,90,6.52,110,6.6,120,6.53,135,6.24,150,5.63,153.5,5.475262
12,42.2,5.710008,52,6.25,60,6.44,75,6.61,90,6.79,110,6.93,120,6.87,135,6.65,150,6.29,161.5,5.884067
14,41.6,5.817078,52,6.39,60,6.59,75,6.8,90,6.91,110,7.26,120,7.21,135,6.97,150,6.66,180,6.19
16,41.6,5.843823,52,6.43,60,6.65,75,6.94,90,7.09,110,7.55,120,7.56,135,7.32,150,6.97,180,6.58
20,43,5.838488,52,6.4,60,6.65,75,7.06,90,7.45,110,7.85,120,8.16,135,8.04,150,7.64,180,7.19

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.47	4.76	5.01	5.02	5.08	4.93	4.46	3.81
8	5.27	5.59	5.87	6	6.1	5.96	5.45	4.79
10	5.91	6.16	6.35	6.52	6.6	6.53	6.24	5.63
12	6.25	6.44	6.61	6.79	6.93	6.87	6.65	6.29
14	6.39	6.59	6.8	6.91	7.26	7.21	6.97	6.66
16	6.43	6.65	6.94	7.09	7.55	7.56	7.32	6.97
20	6.4	6.65	7.06	7.45	7.85	8.16	8.04	7.64

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44.4°	2.88	147.3°	3.3
8	42.8°	3.46	151.8°	4.15
10	42.6°	3.9	153.5°	4.9
12	42.2°	4.23	161.5°	5.58
14	41.6°	4.35	180°	6.19
16	41.6°	4.37	180°	6.58
20	43°	4.27	180°	7.19

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°	4.47	5.27	5.91	6.25	6.39	6.43	6.40
60°	4.76	5.59	6.16	6.44	6.59	6.65	6.65
75°	5.01	5.87	6.35	6.61	6.80	6.94	7.06
90°	5.02	6.00	6.52	6.79	6.91	7.09	7.45
110°	5.08	6.10	6.60	6.93	7.26	7.55	7.85
120°	4.93	5.96	6.53	6.87	7.21	7.56	8.16
135°	4.46	5.45	6.24	6.65	6.97	7.32	8.04
150°	3.81	4.79	5.63	6.29	6.66	6.97	7.64