First Aquarius: ORC Rating

GPH

661.5

OSN

646.6

LOA

9.61 m

Displacement

4152 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6125

Medium

0.8216

High

0.928

Triple Offshore

Low

0.8011

Medium

1.0211

High

1.1254

Boat Specifications

Dimensions

Length overall: 9.61 m
Beam: 3.21 m
Draft: 1.51 m
Displacement: 4152 kg
Crew weight: 400 kg
Wetted surface: 21.66 m²

Sails

Mainsail: 25.17 m²
Genoa: 28.94 m²
Spinnaker: 76.69 m²
Asymmetric spinnaker: 88.66 m²

Design

Type: First 31.7 SK
Builder: Benetau
Designer: Finot
Year built: 1998
Stability index: 108.6

Performance data

Polar CSV

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

6,46,4.534603,52,4.95,60,5.34,75,5.75,90,5.75,110,5.49,120,5.36,135,4.83,145.1,4.328467,150,4.09
8,45.3,5.388155,52,5.9,60,6.28,75,6.58,90,6.57,110,6.58,120,6.49,135,6.02,148.4,5.224679,150,5.14
10,43.8,5.832962,52,6.42,60,6.72,75,6.94,90,6.96,110,7.08,120,7.05,135,6.83,148.2,6.247848,150,6.13
12,42.3,6.002993,52,6.63,60,6.89,75,7.14,90,7.22,110,7.43,120,7.46,135,7.25,150,6.84,157.7,6.52825
14,41.8,6.116897,52,6.74,60,6.98,75,7.26,90,7.44,110,7.72,120,7.88,135,7.68,150,7.22,170,6.681507
16,41.4,6.132425,52,6.79,60,7.02,75,7.32,90,7.62,110,7.94,120,8.29,135,8.16,150,7.61,177.2,7.018379
20,42.5,6.144228,52,6.75,60,7.05,75,7.42,90,7.88,110,8.33,120,8.82,135,9.26,150,8.52,176.6,7.753648

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.95	5.34	5.75	5.75	5.49	5.36	4.83	4.09
8	5.9	6.28	6.58	6.57	6.58	6.49	6.02	5.14
10	6.42	6.72	6.94	6.96	7.08	7.05	6.83	6.13
12	6.63	6.89	7.14	7.22	7.43	7.46	7.25	6.84
14	6.74	6.98	7.26	7.44	7.72	7.88	7.68	7.22
16	6.79	7.02	7.32	7.62	7.94	8.29	8.16	7.61
20	6.75	7.05	7.42	7.88	8.33	8.82	9.26	8.52

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	46°	3.15	145.1°	3.55
8	45.3°	3.79	148.4°	4.45
10	43.8°	4.21	148.2°	5.31
12	42.3°	4.44	157.7°	6.04
14	41.8°	4.56	170°	6.58
16	41.4°	4.6	177.2°	7.01
20	42.5°	4.53	176.6°	7.74

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°	4.95	5.90	6.42	6.63	6.74	6.79	6.75
60°	5.34	6.28	6.72	6.89	6.98	7.02	7.05
75°	5.75	6.58	6.94	7.14	7.26	7.32	7.42
90°	5.75	6.57	6.96	7.22	7.44	7.62	7.88
110°	5.49	6.58	7.08	7.43	7.72	7.94	8.33
120°	5.36	6.49	7.05	7.46	7.88	8.29	8.82
135°	4.83	6.02	6.83	7.25	7.68	8.16	9.26
150°	4.09	5.14	6.13	6.84	7.22	7.61	8.52