WALKABOUT: ORC Rating

GPH

648.6

OSN

633.1

LOA

9.98 m

Displacement

3800 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6546

Medium

0.8473

High

0.9402

Triple Offshore

Low

0.8354

Medium

1.0319

High

1.1265

Boat Specifications

Dimensions

Length overall: 9.98 m
Beam: 3.56 m
Draft: 1.91 m
Displacement: 3800 kg
Crew weight: 480 kg
Wetted surface: 21.26 m²

Sails

Mainsail: 27.96 m²
Genoa: 37.47 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 82.04 m²

Design

Type: Isola 34
Builder: Politi
Designer: Fontana/Maletto/Navona
Year built: 1982

Performance data

Polar CSV

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

6,42.7,4.830493,52,5.39,60,5.64,75,5.81,90,5.7,110,5.57,120,5.41,135,4.86,144,4.412763,150,4.12
8,40.4,5.580809,52,6.16,60,6.33,75,6.43,90,6.4,110,6.47,120,6.37,135,5.97,147.6,5.35337,150,5.21
10,38.3,5.937997,52,6.53,60,6.66,75,6.77,90,6.8,110,6.93,120,6.87,135,6.61,148.8,6.114354,150,6.04
12,37.5,6.100686,52,6.71,60,6.85,75,7,90,7.04,110,7.27,120,7.24,135,7.01,150,6.512511
14,37.1,6.16863,52,6.79,60,6.95,75,7.17,90,7.26,110,7.58,120,7.61,135,7.38,150,6.82,171.8,6.102389
16,37.2,6.201901,52,6.82,60,7,75,7.28,90,7.47,110,7.84,120,7.98,135,7.77,150,7.08,175.4,6.510973
20,37.6,6.247715,52,6.87,60,7.07,75,7.41,90,7.76,110,8.25,120,8.75,135,8.7,150,7.63,176.8,7.101072
24,39.1,6.249626,52,6.84,60,7.08,75,7.5,90,7.96,110,8.63,120,9.39,135,10.3,150,8.29,176.2,7.646812

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.39	5.64	5.81	5.7	5.57	5.41	4.86	4.12
8	6.16	6.33	6.43	6.4	6.47	6.37	5.97	5.21
10	6.53	6.66	6.77	6.8	6.93	6.87	6.61	6.04
12	6.71	6.85	7	7.04	7.27	7.24	7.01	6.51
14	6.79	6.95	7.17	7.26	7.58	7.61	7.38	6.82
16	6.82	7	7.28	7.47	7.84	7.98	7.77	7.08
20	6.87	7.07	7.41	7.76	8.25	8.75	8.7	7.63
24	6.84	7.08	7.5	7.96	8.63	9.39	10.3	8.29

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.7°	3.55	144°	3.57
8	40.4°	4.25	147.6°	4.52
10	38.3°	4.66	148.8°	5.23
12	37.5°	4.84	150°	5.64
14	37.1°	4.92	171.8°	6.04
16	37.2°	4.94	175.4°	6.49
20	37.6°	4.95	176.8°	7.09
24	39.1°	4.85	176.2°	7.63

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°	5.39	6.16	6.53	6.71	6.79	6.82	6.87	6.84
60°	5.64	6.33	6.66	6.85	6.95	7.00	7.07	7.08
75°	5.81	6.43	6.77	7.00	7.17	7.28	7.41	7.50
90°	5.70	6.40	6.80	7.04	7.26	7.47	7.76	7.96
110°	5.57	6.47	6.93	7.27	7.58	7.84	8.25	8.63
120°	5.41	6.37	6.87	7.24	7.61	7.98	8.75	9.39
135°	4.86	5.97	6.61	7.01	7.38	7.77	8.70	10.30
150°	4.12	5.21	6.04	6.51	6.82	7.08	7.63	8.29