CRESCENT IV: ORC Rating

GPH

554.7

OSN

536.1

LOA

12.19 m

Displacement

6400 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7231

Medium

0.9974

High

1.1495

Triple Offshore

Low

0.9338

Medium

1.2256

High

1.3949

Boat Specifications

Dimensions

Length overall: 12.19 m
Beam: 3.75 m
Draft: 2.54 m
Displacement: 6400 kg
Crew weight: 845 kg
Wetted surface: 33.64 m²

Sails

Mainsail: 47.04 m²
Genoa: 40.88 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 153.06 m²

Design

Type: J 121
Builder: CCF COMPONENTS
Designer: JOHNSTONE
Year built: 2017
Stability index: 120.5

Performance data

Polar CSV

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

6,43,5.100131,52,5.71,60,6.05,75,6.33,90,6.27,110,6.39,120,6.25,135,5.6,143.3,5.126122,150,4.74
8,41.4,6.119094,52,6.88,60,7.2,75,7.43,90,7.58,110,7.7,120,7.6,135,7.04,146,6.260271,150,5.99
10,40,6.918659,52,7.64,60,7.83,75,7.97,90,8.13,110,8.34,120,8.27,135,7.95,148.4,7.244106,150,7.12
12,37.6,7.257447,52,7.97,60,8.15,75,8.33,90,8.38,110,8.86,120,8.9,135,8.51,150,7.91,151.4,7.824753
14,36.4,7.404704,52,8.17,60,8.38,75,8.66,90,8.74,110,9.3,120,9.56,135,9.18,150,8.35,150.5,8.306949
16,35.8,7.483998,52,8.26,60,8.52,75,8.95,90,9.17,110,9.66,120,10.15,135,9.95,147.1,9.111266,150,8.83
20,35.1,7.590298,52,8.36,60,8.67,75,9.29,90,9.88,110,10.36,120,11.08,135,11.96,143,11.106443,150,10.24

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.71	6.05	6.33	6.27	6.39	6.25	5.6	4.74
8	6.88	7.2	7.43	7.58	7.7	7.6	7.04	5.99
10	7.64	7.83	7.97	8.13	8.34	8.27	7.95	7.12
12	7.97	8.15	8.33	8.38	8.86	8.9	8.51	7.91
14	8.17	8.38	8.66	8.74	9.3	9.56	9.18	8.35
16	8.26	8.52	8.95	9.17	9.66	10.15	9.95	8.83
20	8.36	8.67	9.29	9.88	10.36	11.08	11.96	10.24

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	3.73	143.3°	4.11
8	41.4°	4.59	146°	5.19
10	40°	5.3	148.4°	6.17
12	37.6°	5.75	151.4°	6.87
14	36.4°	5.96	150.5°	7.23
16	35.8°	6.07	147.1°	7.65
20	35.1°	6.21	143°	8.87

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°	5.71	6.88	7.64	7.97	8.17	8.26	8.36
60°	6.05	7.20	7.83	8.15	8.38	8.52	8.67
75°	6.33	7.43	7.97	8.33	8.66	8.95	9.29
90°	6.27	7.58	8.13	8.38	8.74	9.17	9.88
110°	6.39	7.70	8.34	8.86	9.30	9.66	10.36
120°	6.25	7.60	8.27	8.90	9.56	10.15	11.08
135°	5.60	7.04	7.95	8.51	9.18	9.95	11.96
150°	4.74	5.99	7.12	7.91	8.35	8.83	10.24