GARRY: ORC Rating

GPH

672.3

OSN

651.6

LOA

9.49 m

Displacement

3712 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5955

Medium

0.8203

High

0.9477

Triple Offshore

Low

0.7702

Medium

1.012

High

1.1385

Boat Specifications

Dimensions

Length overall: 9.49 m
Beam: 3.21 m
Draft: 1.93 m
Displacement: 3712 kg
Crew weight: 320 kg
Wetted surface: 21.95 m²

Sails

Mainsail: 25.71 m²
Genoa: 28.05 m²
Spinnaker: 54.77 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.

6,42.8,4.320391,52,4.85,60,5.13,75,5.36,90,5.31,110,5.17,120,5,135,4.49,146.5,3.945384,150,3.8
8,41.2,5.090277,52,5.75,60,6.04,75,6.27,90,6.25,110,6.27,120,6.11,135,5.55,150,4.838195
10,40.5,5.720628,52,6.4,60,6.61,75,6.76,90,6.82,110,6.9,120,6.82,135,6.42,150,5.73,153,5.589185
12,39.6,6.086852,52,6.71,60,6.88,75,7.04,90,7.14,110,7.29,120,7.21,135,6.94,150,6.48,157,6.170527
14,38.8,6.184737,52,6.84,60,7.03,75,7.26,90,7.34,110,7.68,120,7.6,135,7.31,150,6.94,180,6.32
16,38.6,6.218647,52,6.89,60,7.1,75,7.43,90,7.61,110,8.05,120,8.02,135,7.71,150,7.29,180,6.82
20,39.4,6.198773,52,6.89,60,7.12,75,7.56,90,8.04,110,8.47,120,8.88,135,8.64,150,8.08,180,7.51

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.85	5.13	5.36	5.31	5.17	5	4.49	3.8
8	5.75	6.04	6.27	6.25	6.27	6.11	5.55	4.84
10	6.4	6.61	6.76	6.82	6.9	6.82	6.42	5.73
12	6.71	6.88	7.04	7.14	7.29	7.21	6.94	6.48
14	6.84	7.03	7.26	7.34	7.68	7.6	7.31	6.94
16	6.89	7.1	7.43	7.61	8.05	8.02	7.71	7.29
20	6.89	7.12	7.56	8.04	8.47	8.88	8.64	8.08

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	3.17	146.5°	3.29
8	41.2°	3.83	150°	4.19
10	40.5°	4.35	153°	4.98
12	39.6°	4.69	157°	5.68
14	38.8°	4.82	180°	6.32
16	38.6°	4.86	180°	6.82
20	39.4°	4.79	180°	7.51

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°	4.85	5.75	6.40	6.71	6.84	6.89	6.89
60°	5.13	6.04	6.61	6.88	7.03	7.10	7.12
75°	5.36	6.27	6.76	7.04	7.26	7.43	7.56
90°	5.31	6.25	6.82	7.14	7.34	7.61	8.04
110°	5.17	6.27	6.90	7.29	7.68	8.05	8.47
120°	5.00	6.11	6.82	7.21	7.60	8.02	8.88
135°	4.49	5.55	6.42	6.94	7.31	7.71	8.64
150°	3.80	4.84	5.73	6.48	6.94	7.29	8.08