NN: ORC Rating | Offwind

GPH

715.2

OSN

692.1

LOA

5.55 m

Displacement

500 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6513

Medium

0.8503

High

0.9994

Triple Offshore

Low

0.8278

Medium

1.0542

High

1.2495

Boat Specifications

Dimensions

Length overall: 5.55 m
Beam: 2.38 m
Draft: 1.5 m
Displacement: 500 kg
Crew weight: 270 kg
Wetted surface: 8.68 m²

Sails

Mainsail: 15.35 m²
Genoa: 8.56 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 32.64 m²

Design

Type: Seascape 18
Builder: Issa
Designer: Manuard YD
Year built: 2009

Performance data

Polar CSV

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

6,41.7,4.044797,52,4.53,60,4.75,75,4.92,90,5.02,110,5.07,120,4.91,135,4.45,146.9,3.93927,150,3.81
8,40.1,4.758659,52,5.26,60,5.4,75,5.5,90,5.73,110,5.78,120,5.67,135,5.35,148.4,4.860713,150,4.78
10,37.8,5.125577,52,5.63,60,5.78,75,5.94,90,6.33,110,6.47,120,6.31,135,5.93,150,5.41,150.7,5.378013
12,35.9,5.271334,52,5.92,60,6.17,75,6.42,90,6.7,110,7.35,120,7.17,135,6.58,150,5.85,176.8,5.208121
14,35.6,5.312995,52,6.05,60,6.38,75,6.93,90,7.16,110,7.99,120,8.13,135,7.42,150,6.34,178,5.633432
16,35.4,5.348855,52,6.13,60,6.49,75,7.16,90,7.74,110,8.49,120,9.18,135,8.32,143.5,7.675496,150,7.12
20,35.4,5.422463,52,6.34,60,6.73,75,7.4,90,8.39,110,9.65,120,10.92,135,12.6,138.1,12.158887,150,10.45

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.53	4.75	4.92	5.02	5.07	4.91	4.45	3.81
8	5.26	5.4	5.5	5.73	5.78	5.67	5.35	4.78
10	5.63	5.78	5.94	6.33	6.47	6.31	5.93	5.41
12	5.92	6.17	6.42	6.7	7.35	7.17	6.58	5.85
14	6.05	6.38	6.93	7.16	7.99	8.13	7.42	6.34
16	6.13	6.49	7.16	7.74	8.49	9.18	8.32	7.12
20	6.34	6.73	7.4	8.39	9.65	10.92	12.6	10.45

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	41.7°	3.02	146.9°	3.3
8	40.1°	3.64	148.4°	4.14
10	37.8°	4.05	150.7°	4.69
12	35.9°	4.27	176.8°	5.2
14	35.6°	4.32	178°	5.63
16	35.4°	4.36	143.5°	6.17
20	35.4°	4.42	138.1°	9.05

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°	4.53	5.26	5.63	5.92	6.05	6.13	6.34
60°	4.75	5.40	5.78	6.17	6.38	6.49	6.73
75°	4.92	5.50	5.94	6.42	6.93	7.16	7.40
90°	5.02	5.73	6.33	6.70	7.16	7.74	8.39
110°	5.07	5.78	6.47	7.35	7.99	8.49	9.65
120°	4.91	5.67	6.31	7.17	8.13	9.18	10.92
135°	4.45	5.35	5.93	6.58	7.42	8.32	12.60
150°	3.81	4.78	5.41	5.85	6.34	7.12	10.45