MARTA JEAN — ORC Rating

GPH

576.6

OSN

559.2

LOA

12.19 m

Displacement

7480 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7035

Medium

0.961

High

1.1093

Triple Offshore

Low

0.9079

Medium

1.1752

High

1.3191

Boat Specifications

Dimensions

Length overall: 12.19 m
Beam: 3.64 m
Draft: 2.39 m
Displacement: 7480 kg
Crew weight: 795 kg
Wetted surface: 33.05 m²

Sails

Mainsail: 48.99 m²
Genoa: 38.65 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 153.43 m²

Design

Type: j 122
Builder: J Composites
Designer: Rod Johnstone
Year built: 2006
Stability index: 126.8

Velocity Prediction

Polar CSV

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

6,43,4.908706,52,5.49,60,5.81,75,6.06,90,6.18,110,6.31,120,6.17,135,5.58,143.4,5.107014,150,4.74
8,41.2,5.807966,52,6.55,60,6.87,75,7.1,90,7.36,110,7.5,120,7.41,135,6.91,146.9,6.076025,150,5.88
10,40.6,6.598432,52,7.3,60,7.5,75,7.64,90,7.79,110,8.04,120,8,135,7.72,148.2,7.083247,150,6.95
12,38.7,6.944886,52,7.64,60,7.82,75,7.97,90,7.99,110,8.41,120,8.47,135,8.21,150,7.7,156.3,7.393553
14,37.6,7.055501,52,7.8,60,7.99,75,8.22,90,8.28,110,8.68,120,8.96,135,8.72,150,8.14,166.4,7.551743
16,37.5,7.146879,52,7.87,60,8.08,75,8.42,90,8.58,110,8.94,120,9.32,135,9.29,150,8.6,177.2,7.839359
20,36.6,7.249469,52,7.95,60,8.17,75,8.64,90,9.11,110,9.42,120,9.95,135,10.7,150,9.67,175.4,8.70805

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.49	5.81	6.06	6.18	6.31	6.17	5.58	4.74
8	6.55	6.87	7.1	7.36	7.5	7.41	6.91	5.88
10	7.3	7.5	7.64	7.79	8.04	8	7.72	6.95
12	7.64	7.82	7.97	7.99	8.41	8.47	8.21	7.7
14	7.8	7.99	8.22	8.28	8.68	8.96	8.72	8.14
16	7.87	8.08	8.42	8.58	8.94	9.32	9.29	8.6
20	7.95	8.17	8.64	9.11	9.42	9.95	10.7	9.67

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	3.59	143.4°	4.1
8	41.2°	4.37	146.9°	5.09
10	40.6°	5.01	148.2°	6.02
12	38.7°	5.42	156.3°	6.77
14	37.6°	5.59	166.4°	7.34
16	37.5°	5.67	177.2°	7.83
20	36.6°	5.82	175.4°	8.68

Loading polar chart…