ISSABELA: ORC Rating

GPH

587.6

OSN

569.7

LOA

12.5 m

Displacement

9988 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6849

Medium

0.9337

High

1.0674

Triple Offshore

Low

0.8849

Medium

1.1576

High

1.2915

Boat Specifications

Dimensions

Length overall: 12.5 m
Beam: 3.98 m
Draft: 2.53 m
Displacement: 9988 kg
Crew weight: 600 kg
Wetted surface: 37.32 m²

Sails

Mainsail: 51.8 m²
Genoa: 43.28 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 152.01 m²

Design

Type: X 4^3
Builder: X Yachts
Designer: JEPPESEN Niels
Year built: 2016
Stability index: 128.8

Performance data

Polar CSV

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

6,43.5,4.838881,52,5.38,60,5.7,75,5.95,90,6,110,6.1,120,5.97,135,5.37,143.9,4.876299,150,4.56
8,41.4,5.705822,52,6.41,60,6.74,75,7.01,90,7.23,110,7.38,120,7.25,135,6.67,147.8,5.861546,150,5.73
10,40.8,6.433331,52,7.22,60,7.47,75,7.66,90,7.87,110,8.04,120,7.97,135,7.63,147.8,6.93695,150,6.78
12,40,6.905605,52,7.64,60,7.84,75,8.01,90,8.08,110,8.43,120,8.4,135,8.14,149.8,7.578608,150,7.57
14,39.4,7.091707,52,7.83,60,8.04,75,8.24,90,8.3,110,8.71,120,8.84,135,8.56,150,7.98,151.1,7.904375
16,38.8,7.13426,52,7.91,60,8.13,75,8.42,90,8.55,110,8.94,120,9.27,135,9.03,150,8.28,171.2,7.437552
20,38.2,7.215054,52,7.96,60,8.19,75,8.61,90,9.02,110,9.35,120,9.81,135,10.08,150,8.91,176.8,8.172743

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.38	5.7	5.95	6	6.1	5.97	5.37	4.56
8	6.41	6.74	7.01	7.23	7.38	7.25	6.67	5.73
10	7.22	7.47	7.66	7.87	8.04	7.97	7.63	6.78
12	7.64	7.84	8.01	8.08	8.43	8.4	8.14	7.57
14	7.83	8.04	8.24	8.3	8.71	8.84	8.56	7.98
16	7.91	8.13	8.42	8.55	8.94	9.27	9.03	8.28
20	7.96	8.19	8.61	9.02	9.35	9.81	10.08	8.91

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.5°	3.51	143.9°	3.94
8	41.4°	4.28	147.8°	4.96
10	40.8°	4.87	147.8°	5.87
12	40°	5.29	149.8°	6.55
14	39.4°	5.48	151.1°	6.92
16	38.8°	5.56	171.2°	7.35
20	38.2°	5.67	176.8°	8.16

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°	5.38	6.41	7.22	7.64	7.83	7.91	7.96
60°	5.70	6.74	7.47	7.84	8.04	8.13	8.19
75°	5.95	7.01	7.66	8.01	8.24	8.42	8.61
90°	6.00	7.23	7.87	8.08	8.30	8.55	9.02
110°	6.10	7.38	8.04	8.43	8.71	8.94	9.35
120°	5.97	7.25	7.97	8.40	8.84	9.27	9.81
135°	5.37	6.67	7.63	8.14	8.56	9.03	10.08
150°	4.56	5.73	6.78	7.57	7.98	8.28	8.91