RODAMON: ORC Rating

GPH

683.5

OSN

662.1

LOA

9.61 m

Displacement

3750 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5873

Medium

0.8062

High

0.9226

Triple Offshore

Low

0.7586

Medium

0.996

High

1.11

Boat Specifications

Dimensions

Length overall: 9.61 m
Beam: 3.21 m
Draft: 1.93 m
Displacement: 3750 kg
Crew weight: 140 kg
Wetted surface: 22.04 m²

Sails

Mainsail: 23.69 m²
Genoa: 24.63 m²
Spinnaker: 66.75 m²
Asymmetric spinnaker: 0 m²

Design

Type: FIRST 31.7
Builder: BENETEAU
Designer: FINOT
Year built: 1998

Performance data

Polar CSV

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

6,42.8,4.129585,52,4.63,60,4.91,75,5.13,90,5.1,110,5.22,120,5.09,135,4.62,146,4.052892,150,3.87
8,41.2,4.890919,52,5.51,60,5.79,75,6.04,90,6.15,110,6.31,120,6.18,135,5.68,150,4.919024
10,40.5,5.470762,52,6.18,60,6.43,75,6.61,90,6.76,110,6.91,120,6.85,135,6.54,150,5.83,151,5.785372
12,40.5,5.904741,52,6.54,60,6.74,75,6.91,90,6.96,110,7.26,120,7.24,135,7.01,150,6.59,157,6.279163
14,39.8,6.000389,52,6.67,60,6.88,75,7.11,90,7.2,110,7.53,120,7.62,135,7.38,150,7.01,176,6.395579
16,40.1,6.065983,52,6.71,60,6.94,75,7.24,90,7.42,110,7.72,120,8.01,135,7.81,150,7.36,180,6.86
20,41.2,6.020614,52,6.68,60,6.93,75,7.32,90,7.78,110,8.06,120,8.47,135,8.75,150,8.18,180,7.55

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.63	4.91	5.13	5.1	5.22	5.09	4.62	3.87
8	5.51	5.79	6.04	6.15	6.31	6.18	5.68	4.91
10	6.18	6.43	6.61	6.76	6.91	6.85	6.54	5.83
12	6.54	6.74	6.91	6.96	7.26	7.24	7.01	6.59
14	6.67	6.88	7.11	7.2	7.53	7.62	7.38	7.01
16	6.71	6.94	7.24	7.42	7.72	8.01	7.81	7.36
20	6.68	6.93	7.32	7.78	8.06	8.47	8.75	8.18

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	3.03	146°	3.36
8	41.2°	3.68	150°	4.26
10	40.5°	4.16	151°	5.06
12	40.5°	4.49	157°	5.78
14	39.8°	4.61	176°	6.38
16	40.1°	4.64	180°	6.86
20	41.2°	4.53	180°	7.55

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°	4.63	5.51	6.18	6.54	6.67	6.71	6.68
60°	4.91	5.79	6.43	6.74	6.88	6.94	6.93
75°	5.13	6.04	6.61	6.91	7.11	7.24	7.32
90°	5.10	6.15	6.76	6.96	7.20	7.42	7.78
110°	5.22	6.31	6.91	7.26	7.53	7.72	8.06
120°	5.09	6.18	6.85	7.24	7.62	8.01	8.47
135°	4.62	5.68	6.54	7.01	7.38	7.81	8.75
150°	3.87	4.91	5.83	6.59	7.01	7.36	8.18