RAYO 4: ORC Rating

GPH

553.1

OSN

539.1

LOA

12.47 m

Displacement

5684 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7488

Medium

0.9887

High

1.1331

Triple Offshore

Low

0.9657

Medium

1.2146

High

1.3564

Boat Specifications

Dimensions

Length overall: 12.47 m
Beam: 3.73 m
Draft: 2.73 m
Displacement: 5684 kg
Crew weight: 757 kg
Wetted surface: 30.73 m²

Sails

Mainsail: 58.1 m²
Genoa: 48.72 m²
Spinnaker: 99.66 m²
Asymmetric spinnaker: 0 m²

Design

Type: SIDNEY 40
Builder: BASHFORD INT.
Designer: MURRAY/BURNS/DOVEL
Year built: 1998
Stability index: 118.4

Performance data

Polar CSV

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

6,41.8,5.808369,52,6.5,60,6.8,75,6.97,90,6.81,110,6.23,120,6.01,135,5.32,140.6,4.969371,150,4.43
8,39.4,6.65171,52,7.43,60,7.64,75,7.76,90,7.69,110,7.47,120,7.29,135,6.64,146,5.886344,150,5.64
10,37.5,6.945203,52,7.76,60,7.97,75,8.17,90,8.17,110,8.14,120,8.02,135,7.57,150,6.72,150.5,6.686921
12,37,7.137173,52,7.92,60,8.14,75,8.43,90,8.56,110,8.64,120,8.58,135,8.16,150,7.56,156.1,7.240877
14,36.4,7.230768,52,8.03,60,8.25,75,8.6,90,8.88,110,9.05,120,9.13,135,8.7,150,8.12,165.5,7.529843
16,36,7.292801,52,8.11,60,8.34,75,8.73,90,9.1,110,9.35,120,9.67,135,9.28,150,8.63,176.6,7.883877
20,36.3,7.370383,52,8.18,60,8.45,75,8.91,90,9.42,110,9.9,120,10.54,135,10.77,150,9.8,177.2,8.830542

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	6.5	6.8	6.97	6.81	6.23	6.01	5.32	4.43
8	7.43	7.64	7.76	7.69	7.47	7.29	6.64	5.64
10	7.76	7.97	8.17	8.17	8.14	8.02	7.57	6.72
12	7.92	8.14	8.43	8.56	8.64	8.58	8.16	7.56
14	8.03	8.25	8.6	8.88	9.05	9.13	8.7	8.12
16	8.11	8.34	8.73	9.1	9.35	9.67	9.28	8.63
20	8.18	8.45	8.91	9.42	9.9	10.54	10.77	9.8

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	41.8°	4.33	140.6°	3.84
8	39.4°	5.14	146°	4.88
10	37.5°	5.51	150.5°	5.82
12	37°	5.7	156.1°	6.62
14	36.4°	5.82	165.5°	7.29
16	36°	5.9	176.6°	7.87
20	36.3°	5.94	177.2°	8.82

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°	6.50	7.43	7.76	7.92	8.03	8.11	8.18
60°	6.80	7.64	7.97	8.14	8.25	8.34	8.45
75°	6.97	7.76	8.17	8.43	8.60	8.73	8.91
90°	6.81	7.69	8.17	8.56	8.88	9.10	9.42
110°	6.23	7.47	8.14	8.64	9.05	9.35	9.90
120°	6.01	7.29	8.02	8.58	9.13	9.67	10.54
135°	5.32	6.64	7.57	8.16	8.70	9.28	10.77
150°	4.43	5.64	6.72	7.56	8.12	8.63	9.80