LICHTBLICK: ORC Rating

GPH

667

OSN

644.1

LOA

9.61 m

Displacement

3388 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6021

Medium

0.8313

High

0.9613

Triple Offshore

Low

0.7754

Medium

1.0209

High

1.1508

Boat Specifications

Dimensions

Length overall: 9.61 m
Beam: 3.21 m
Draft: 1.91 m
Displacement: 3388 kg
Crew weight: 479 kg
Wetted surface: 21.08 m²

Sails

Mainsail: 24.83 m²
Genoa: 26.5 m²
Spinnaker: 59.16 m²
Asymmetric spinnaker: 0 m²

Design

Type: FIRST 31.7
Builder: BENETEAU
Designer: FINOT-LONQ
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.

6,43.6,4.460267,52,4.94,60,5.19,75,5.34,90,5.21,110,5.18,120,5,135,4.47,145.1,3.974874,150,3.76
8,41.2,5.249763,52,5.85,60,6.09,75,6.24,90,6.18,110,6.29,120,6.12,135,5.58,148.9,4.905012,150,4.85
10,39.6,5.78835,52,6.42,60,6.61,75,6.75,90,6.81,110,6.93,120,6.84,135,6.44,150,5.78,152.3,5.6585
12,38.3,6.078165,52,6.75,60,6.91,75,7.07,90,7.15,110,7.36,120,7.29,135,6.98,150,6.51,157.5,6.180459
14,37.9,6.209731,52,6.91,60,7.09,75,7.31,90,7.38,110,7.74,120,7.7,135,7.4,150,6.99,168.7,6.43474
16,37.8,6.264594,52,6.97,60,7.18,75,7.5,90,7.64,110,8.07,120,8.1,135,7.82,150,7.39,177.2,6.81814
20,38.3,6.307529,52,7.01,60,7.26,75,7.69,90,8.06,110,8.5,120,8.91,135,8.76,150,8.19,178.1,7.564159
24,39.8,6.273726,52,6.97,60,7.24,75,7.77,90,8.29,110,8.82,120,9.56,135,10.21,150,9.2,177.2,8.329945

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.94	5.19	5.34	5.21	5.18	5	4.47	3.76
8	5.85	6.09	6.24	6.18	6.29	6.12	5.58	4.85
10	6.42	6.61	6.75	6.81	6.93	6.84	6.44	5.78
12	6.75	6.91	7.07	7.15	7.36	7.29	6.98	6.51
14	6.91	7.09	7.31	7.38	7.74	7.7	7.4	6.99
16	6.97	7.18	7.5	7.64	8.07	8.1	7.82	7.39
20	7.01	7.26	7.69	8.06	8.5	8.91	8.76	8.19
24	6.97	7.24	7.77	8.29	8.82	9.56	10.21	9.2

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.6°	3.23	145.1°	3.26
8	41.2°	3.95	148.9°	4.2
10	39.6°	4.46	152.3°	5.01
12	38.3°	4.77	157.5°	5.71
14	37.9°	4.9	168.7°	6.31
16	37.8°	4.95	177.2°	6.81
20	38.3°	4.95	178.1°	7.56
24	39.8°	4.82	177.2°	8.32

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 kt24 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)	Boat speed in 24 kt (kt)
0°	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
52°	4.94	5.85	6.42	6.75	6.91	6.97	7.01	6.97
60°	5.19	6.09	6.61	6.91	7.09	7.18	7.26	7.24
75°	5.34	6.24	6.75	7.07	7.31	7.50	7.69	7.77
90°	5.21	6.18	6.81	7.15	7.38	7.64	8.06	8.29
110°	5.18	6.29	6.93	7.36	7.74	8.07	8.50	8.82
120°	5.00	6.12	6.84	7.29	7.70	8.10	8.91	9.56
135°	4.47	5.58	6.44	6.98	7.40	7.82	8.76	10.21
150°	3.76	4.85	5.78	6.51	6.99	7.39	8.19	9.20