IRISH-MIST: ORC Rating

GPH

604

OSN

586.2

LOA

12.029 m

Displacement

6582 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6731

Medium

0.914

High

1.0503

Triple Offshore

Low

0.8679

Medium

1.1228

High

1.2499

Boat Specifications

Dimensions

Length overall: 12.029 m
Beam: 3.62 m
Draft: 2.14 m
Displacement: 6582 kg
Crew weight: 620 kg
Wetted surface: 30.56 m²

Sails

Mainsail: 37.42 m²
Genoa: 49.58 m²
Spinnaker: 112.88 m²
Asymmetric spinnaker: 0 m²

Design

Type: Lightwave 395
Builder: Oyster Mar.
Designer: C.Schumacher
Year built: 1987
Stability index: 113

Performance data

Polar CSV

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

6,43,4.922379,52,5.49,60,5.8,75,6.04,90,5.95,110,5.73,120,5.59,135,5.05,144.2,4.54958,150,4.26
8,41.4,5.839135,52,6.55,60,6.83,75,7.01,90,6.96,110,6.97,120,6.83,135,6.26,148.4,5.494719,150,5.4
10,40.6,6.479897,52,7.16,60,7.35,75,7.5,90,7.5,110,7.62,120,7.55,135,7.2,150,6.42,150.2,6.407261
12,39.4,6.703475,52,7.38,60,7.58,75,7.77,90,7.81,110,7.99,120,7.98,135,7.71,150,7.23,155.6,6.961803
14,38.4,6.762848,52,7.48,60,7.68,75,7.95,90,8.08,110,8.27,120,8.4,135,8.14,150,7.7,164.6,7.20883
16,38.2,6.82058,52,7.53,60,7.74,75,8.06,90,8.33,110,8.49,120,8.8,135,8.61,150,8.1,177.2,7.468917
20,38.1,6.963726,52,7.6,60,7.79,75,8.18,90,8.67,110,8.87,120,9.3,135,9.64,150,9.02,177.2,8.239837

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.49	5.8	6.04	5.95	5.73	5.59	5.05	4.26
8	6.55	6.83	7.01	6.96	6.97	6.83	6.26	5.4
10	7.16	7.35	7.5	7.5	7.62	7.55	7.2	6.42
12	7.38	7.58	7.77	7.81	7.99	7.98	7.71	7.23
14	7.48	7.68	7.95	8.08	8.27	8.4	8.14	7.7
16	7.53	7.74	8.06	8.33	8.49	8.8	8.61	8.1
20	7.6	7.79	8.18	8.67	8.87	9.3	9.64	9.02

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	3.6	144.2°	3.69
8	41.4°	4.38	148.4°	4.68
10	40.6°	4.92	150.2°	5.56
12	39.4°	5.18	155.6°	6.34
14	38.4°	5.3	164.6°	6.95
16	38.2°	5.36	177.2°	7.46
20	38.1°	5.48	177.2°	8.23

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°	5.49	6.55	7.16	7.38	7.48	7.53	7.60
60°	5.80	6.83	7.35	7.58	7.68	7.74	7.79
75°	6.04	7.01	7.50	7.77	7.95	8.06	8.18
90°	5.95	6.96	7.50	7.81	8.08	8.33	8.67
110°	5.73	6.97	7.62	7.99	8.27	8.49	8.87
120°	5.59	6.83	7.55	7.98	8.40	8.80	9.30
135°	5.05	6.26	7.20	7.71	8.14	8.61	9.64
150°	4.26	5.40	6.42	7.23	7.70	8.10	9.02