SOFIA: ORC Rating

GPH

778.5

OSN

750.5

LOA

8.8 m

Displacement

3123 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5127

Medium

0.7112

High

0.8303

Triple Offshore

Low

0.6602

Medium

0.8771

High

0.9885

Boat Specifications

Dimensions

Length overall: 8.8 m
Beam: 2.7 m
Draft: 1.56 m
Displacement: 3123 kg
Crew weight: 320 kg
Wetted surface: 17.51 m²

Sails

Mainsail: 17.45 m²
Genoa: 19.06 m²
Spinnaker: 58.41 m²
Asymmetric spinnaker: 0 m²

Design

Type: OHLSON 29
Builder: ARTEKNO
Designer: OHLSON EINAR
Year built: 1979

Performance data

Polar CSV

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

6,44.8,3.579629,52,3.93,60,4.15,75,4.29,90,4.5,110,4.64,120,4.5,135,4.07,147.1,3.608776,150,3.5
8,42.7,4.272605,52,4.73,60,4.96,75,5.13,90,5.43,110,5.6,120,5.5,135,5.07,150,4.47,150.5,4.446458
10,41.5,4.753285,52,5.3,60,5.52,75,5.71,90,5.97,110,6.16,120,6.11,135,5.83,150,5.3,153.1,5.158121
12,41.1,5.1356,52,5.68,60,5.87,75,6.05,90,6.22,110,6.47,120,6.47,135,6.28,150,5.92,159.9,5.579845
14,40.7,5.355251,52,5.9,60,6.08,75,6.26,90,6.34,110,6.7,120,6.75,135,6.61,150,6.31,173.6,5.816247
16,40.5,5.44446,52,6.01,60,6.19,75,6.41,90,6.5,110,6.87,120,6.99,135,6.91,150,6.62,178.1,6.1834
20,40.8,5.508623,52,6.07,60,6.27,75,6.58,90,6.78,110,7.1,120,7.41,135,7.5,150,7.18,178.8,6.751481
24,41.9,5.46814,52,6.04,60,6.27,75,6.64,90,6.96,110,7.16,120,7.69,135,8.2,150,7.81,178.6,7.282174

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	3.93	4.15	4.29	4.5	4.64	4.5	4.07	3.5
8	4.73	4.96	5.13	5.43	5.6	5.5	5.07	4.47
10	5.3	5.52	5.71	5.97	6.16	6.11	5.83	5.3
12	5.68	5.87	6.05	6.22	6.47	6.47	6.28	5.92
14	5.9	6.08	6.26	6.34	6.7	6.75	6.61	6.31
16	6.01	6.19	6.41	6.5	6.87	6.99	6.91	6.62
20	6.07	6.27	6.58	6.78	7.1	7.41	7.5	7.18
24	6.04	6.27	6.64	6.96	7.16	7.69	8.2	7.81

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44.8°	2.54	147.1°	3.03
8	42.7°	3.14	150.5°	3.87
10	41.5°	3.56	153.1°	4.6
12	41.1°	3.87	159.9°	5.24
14	40.7°	4.06	173.6°	5.78
16	40.5°	4.14	178.1°	6.18
20	40.8°	4.17	178.8°	6.75
24	41.9°	4.07	178.6°	7.28

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°	3.93	4.73	5.30	5.68	5.90	6.01	6.07	6.04
60°	4.15	4.96	5.52	5.87	6.08	6.19	6.27	6.27
75°	4.29	5.13	5.71	6.05	6.26	6.41	6.58	6.64
90°	4.50	5.43	5.97	6.22	6.34	6.50	6.78	6.96
110°	4.64	5.60	6.16	6.47	6.70	6.87	7.10	7.16
120°	4.50	5.50	6.11	6.47	6.75	6.99	7.41	7.69
135°	4.07	5.07	5.83	6.28	6.61	6.91	7.50	8.20
150°	3.50	4.47	5.30	5.92	6.31	6.62	7.18	7.81