BLAUMARINA I: ORC Rating

GPH

674.8

OSN

654.3

LOA

9.49 m

Displacement

3644 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5961

Medium

0.8171

High

0.9371

Triple Offshore

Low

0.7697

Medium

1.0079

High

1.127

Boat Specifications

Dimensions

Length overall: 9.49 m
Beam: 3.22 m
Draft: 1.92 m
Displacement: 3644 kg
Crew weight: 380 kg
Wetted surface: 22.04 m²

Sails

Mainsail: 24.83 m²
Genoa: 27.59 m²
Spinnaker: 59.28 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.

6,42.8,4.306762,52,4.83,60,5.11,75,5.33,90,5.26,110,5.18,120,5.01,135,4.52,146,3.992581,150,3.82
8,41.2,5.076986,52,5.72,60,6,75,6.22,90,6.2,110,6.28,120,6.13,135,5.58,150,4.861289
10,40.5,5.694327,52,6.36,60,6.56,75,6.72,90,6.79,110,6.89,120,6.81,135,6.45,150,5.76,152,5.651525
12,39.8,6.039437,52,6.66,60,6.84,75,7,90,7.08,110,7.28,120,7.21,135,6.94,150,6.5,157,6.192254
14,39.2,6.103663,52,6.76,60,6.96,75,7.2,90,7.3,110,7.65,120,7.61,135,7.31,150,6.95,180,6.33
16,39,6.124976,52,6.8,60,7.01,75,7.34,90,7.55,110,7.95,120,8.03,135,7.73,150,7.29,180,6.82
20,39.8,6.117533,52,6.78,60,7.02,75,7.43,90,7.93,110,8.33,120,8.75,135,8.69,150,8.1,180,7.51

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.83	5.11	5.33	5.26	5.18	5.01	4.52	3.82
8	5.72	6	6.22	6.2	6.28	6.13	5.58	4.86
10	6.36	6.56	6.72	6.79	6.89	6.81	6.45	5.76
12	6.66	6.84	7	7.08	7.28	7.21	6.94	6.5
14	6.76	6.96	7.2	7.3	7.65	7.61	7.31	6.95
16	6.8	7.01	7.34	7.55	7.95	8.03	7.73	7.29
20	6.78	7.02	7.43	7.93	8.33	8.75	8.69	8.1

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	3.16	146°	3.31
8	41.2°	3.82	150°	4.21
10	40.5°	4.33	152°	4.99
12	39.8°	4.64	157°	5.7
14	39.2°	4.73	180°	6.33
16	39°	4.76	180°	6.82
20	39.8°	4.7	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°	4.83	5.72	6.36	6.66	6.76	6.80	6.78
60°	5.11	6.00	6.56	6.84	6.96	7.01	7.02
75°	5.33	6.22	6.72	7.00	7.20	7.34	7.43
90°	5.26	6.20	6.79	7.08	7.30	7.55	7.93
110°	5.18	6.28	6.89	7.28	7.65	7.95	8.33
120°	5.01	6.13	6.81	7.21	7.61	8.03	8.75
135°	4.52	5.58	6.45	6.94	7.31	7.73	8.69
150°	3.82	4.86	5.76	6.50	6.95	7.29	8.10