Ramona: ORC Rating

GPH

681

OSN

663.8

LOA

9.45 m

Displacement

4420 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.618

Medium

0.8117

High

0.9143

Triple Offshore

Low

0.7895

Medium

0.986

High

1.0796

Boat Specifications

Dimensions

Length overall: 9.45 m
Beam: 3.02 m
Draft: 1.63 m
Displacement: 4420 kg
Crew weight: 450 kg
Wetted surface: 20.79 m²

Sails

Mainsail: 31.09 m²
Genoa: 29.23 m²
Spinnaker: 69.83 m²
Asymmetric spinnaker: 66.7 m²

Design

Type: Inferno 31
Builder: -
Designer: Håkan Södergren
Year built: 1985

Performance data

Polar CSV

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

6,43,4.539527,52,5.02,60,5.26,75,5.41,90,5.31,110,5.31,120,5.14,135,4.65,145.1,4.194345,150,3.97
8,41.1,5.228492,52,5.8,60,5.99,75,6.12,90,6.15,110,6.23,120,6.1,135,5.67,147.8,5.0934,150,4.97
10,40,5.639359,52,6.2,60,6.35,75,6.48,90,6.57,110,6.67,120,6.61,135,6.35,150,5.81,153.7,5.644257
12,39.5,5.818892,52,6.39,60,6.54,75,6.69,90,6.79,110,6.98,120,6.95,135,6.75,150,6.4,162.3,6.004231
14,39.2,5.910101,52,6.48,60,6.64,75,6.84,90,6.94,110,7.24,120,7.25,135,7.07,150,6.76,176.3,6.273075
16,39.1,5.953252,52,6.53,60,6.7,75,6.95,90,7.1,110,7.46,120,7.54,135,7.38,150,7.07,179,6.641011
20,39.1,5.99191,52,6.58,60,6.76,75,7.07,90,7.34,110,7.76,120,8.11,135,8.04,150,7.68,179,7.231101
24,40.1,5.987543,52,6.57,60,6.78,75,7.14,90,7.5,110,7.99,120,8.5,135,8.83,150,8.41,178.6,7.812332

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.02	5.26	5.41	5.31	5.31	5.14	4.65	3.97
8	5.8	5.99	6.12	6.15	6.23	6.1	5.67	4.97
10	6.2	6.35	6.48	6.57	6.67	6.61	6.35	5.81
12	6.39	6.54	6.69	6.79	6.98	6.95	6.75	6.4
14	6.48	6.64	6.84	6.94	7.24	7.25	7.07	6.76
16	6.53	6.7	6.95	7.1	7.46	7.54	7.38	7.07
20	6.58	6.76	7.07	7.34	7.76	8.11	8.04	7.68
24	6.57	6.78	7.14	7.5	7.99	8.5	8.83	8.41

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	3.32	145.1°	3.44
8	41.1°	3.94	147.8°	4.31
10	40°	4.32	153.7°	5.06
12	39.5°	4.49	162.3°	5.72
14	39.2°	4.58	176.3°	6.26
16	39.1°	4.62	179°	6.64
20	39.1°	4.65	179°	7.23
24	40.1°	4.58	178.6°	7.81

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 kt24 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)	Boat speed in 24 kt (kt)
0°	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
52°	5.02	5.80	6.20	6.39	6.48	6.53	6.58	6.57
60°	5.26	5.99	6.35	6.54	6.64	6.70	6.76	6.78
75°	5.41	6.12	6.48	6.69	6.84	6.95	7.07	7.14
90°	5.31	6.15	6.57	6.79	6.94	7.10	7.34	7.50
110°	5.31	6.23	6.67	6.98	7.24	7.46	7.76	7.99
120°	5.14	6.10	6.61	6.95	7.25	7.54	8.11	8.50
135°	4.65	5.67	6.35	6.75	7.07	7.38	8.04	8.83
150°	3.97	4.97	5.81	6.40	6.76	7.07	7.68	8.41