Arabesque: ORC Rating

GPH

668.7

OSN

650.6

LOA

9.634 m

Displacement

3332 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6369

Medium

0.8349

High

0.9365

Triple Offshore

Low

0.8086

Medium

1.0016

High

1.0947

Boat Specifications

Dimensions

Length overall: 9.634 m
Beam: 2.98 m
Draft: 1.85 m
Displacement: 3332 kg
Crew weight: 600 kg
Wetted surface: 18.06 m²

Sails

Mainsail: 23.02 m²
Genoa: 36.76 m²
Spinnaker: 69.88 m²
Asymmetric spinnaker: 0 m²

Design

Type: CHANCE 31.5
Builder: Lathrop
Designer: Chance
Year built: 1982
Stability index: 121

Performance data

Polar CSV

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

6,41.7,4.727859,52,5.28,60,5.51,75,5.62,90,5.49,110,5.24,120,5.1,135,4.64,146,4.125265,150,3.95
8,39.6,5.437934,52,6.01,60,6.15,75,6.23,90,6.19,110,6.18,120,6.07,135,5.68,150,4.98,150.5,4.951998
10,37.6,5.768093,52,6.33,60,6.45,75,6.54,90,6.54,110,6.62,120,6.57,135,6.33,150,5.84,154.1,5.647219
12,36.9,5.889822,52,6.47,60,6.6,75,6.74,90,6.78,110,6.93,120,6.91,135,6.71,150,6.38,162.8,5.977315
14,36.4,5.951096,52,6.54,60,6.68,75,6.88,90,6.98,110,7.18,120,7.22,135,7.04,150,6.73,175.4,6.250132
16,36,5.982569,52,6.59,60,6.73,75,6.97,90,7.15,110,7.39,120,7.53,135,7.39,150,7.04,179,6.601005
20,36.4,6.038064,52,6.63,60,6.79,75,7.07,90,7.38,110,7.69,120,8.09,135,8.23,150,7.72,179,7.191095

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.28	5.51	5.62	5.49	5.24	5.1	4.64	3.95
8	6.01	6.15	6.23	6.19	6.18	6.07	5.68	4.98
10	6.33	6.45	6.54	6.54	6.62	6.57	6.33	5.84
12	6.47	6.6	6.74	6.78	6.93	6.91	6.71	6.38
14	6.54	6.68	6.88	6.98	7.18	7.22	7.04	6.73
16	6.59	6.73	6.97	7.15	7.39	7.53	7.39	7.04
20	6.63	6.79	7.07	7.38	7.69	8.09	8.23	7.72

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	41.7°	3.53	146°	3.42
8	39.6°	4.19	150.5°	4.31
10	37.6°	4.57	154.1°	5.08
12	36.9°	4.71	162.8°	5.71
14	36.4°	4.79	175.4°	6.23
16	36°	4.84	179°	6.6
20	36.4°	4.86	179°	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°	5.28	6.01	6.33	6.47	6.54	6.59	6.63
60°	5.51	6.15	6.45	6.60	6.68	6.73	6.79
75°	5.62	6.23	6.54	6.74	6.88	6.97	7.07
90°	5.49	6.19	6.54	6.78	6.98	7.15	7.38
110°	5.24	6.18	6.62	6.93	7.18	7.39	7.69
120°	5.10	6.07	6.57	6.91	7.22	7.53	8.09
135°	4.64	5.68	6.33	6.71	7.04	7.39	8.23
150°	3.95	4.98	5.84	6.38	6.73	7.04	7.72