ARCO IRIS: ORC Rating

GPH

732.2

OSN

706.2

LOA

8.91 m

Displacement

2920 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5289

Medium

0.752

High

0.9053

Triple Offshore

Low

0.6878

Medium

0.936

High

1.0889

Boat Specifications

Dimensions

Length overall: 8.91 m
Beam: 3.03 m
Draft: 1.71 m
Displacement: 2920 kg
Crew weight: 476 kg
Wetted surface: 19.66 m²

Sails

Mainsail: 15.95 m²
Genoa: 31.95 m²
Spinnaker: 60.82 m²
Asymmetric spinnaker: 0 m²

Design

Type: NAJA 30
Builder: WHISSTOCKS BOATYAR
Designer: S LANGEVIN
Year built: 1978

Performance data

Polar CSV

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

6,45,3.846661,52,4.25,60,4.54,75,4.77,90,4.7,110,4.68,120,4.53,135,4.03,147,3.565166,150,3.46
8,43.9,4.635341,52,5.14,60,5.45,75,5.71,90,5.66,110,5.78,120,5.64,135,5.12,150,4.445597
10,42.8,5.206276,52,5.8,60,6.07,75,6.28,90,6.33,110,6.47,120,6.39,135,6.06,150,5.35781
12,41.6,5.683352,52,6.24,60,6.43,75,6.59,90,6.74,110,6.88,120,6.82,135,6.57,150,6.13,156,5.856304
14,40.1,5.948324,52,6.5,60,6.67,75,6.84,90,7.01,110,7.29,120,7.23,135,6.95,150,6.58,174,5.982774
16,39.4,6.04348,52,6.62,60,6.83,75,7.09,90,7.18,110,7.69,120,7.66,135,7.36,150,6.92,180,6.44
20,39.8,6.104517,52,6.67,60,6.92,75,7.39,90,7.69,110,8.24,120,8.57,135,8.23,150,7.67,180,7.12

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.25	4.54	4.77	4.7	4.68	4.53	4.03	3.46
8	5.14	5.45	5.71	5.66	5.78	5.64	5.12	4.44
10	5.8	6.07	6.28	6.33	6.47	6.39	6.06	5.36
12	6.24	6.43	6.59	6.74	6.88	6.82	6.57	6.13
14	6.5	6.67	6.84	7.01	7.29	7.23	6.95	6.58
16	6.62	6.83	7.09	7.18	7.69	7.66	7.36	6.92
20	6.67	6.92	7.39	7.69	8.24	8.57	8.23	7.67

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	45°	2.72	147°	2.99
8	43.9°	3.34	150°	3.85
10	42.8°	3.82	150°	4.64
12	41.6°	4.25	156°	5.35
14	40.1°	4.55	174°	5.95
16	39.4°	4.67	180°	6.44
20	39.8°	4.69	180°	7.12

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°	4.25	5.14	5.80	6.24	6.50	6.62	6.67
60°	4.54	5.45	6.07	6.43	6.67	6.83	6.92
75°	4.77	5.71	6.28	6.59	6.84	7.09	7.39
90°	4.70	5.66	6.33	6.74	7.01	7.18	7.69
110°	4.68	5.78	6.47	6.88	7.29	7.69	8.24
120°	4.53	5.64	6.39	6.82	7.23	7.66	8.57
135°	4.03	5.12	6.06	6.57	6.95	7.36	8.23
150°	3.46	4.44	5.36	6.13	6.58	6.92	7.67