Kelso: ORC Rating

GPH

622.6

OSN

607.4

LOA

11.97 m

Displacement

7219 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6555

Medium

0.8819

High

1.0128

Triple Offshore

Low

0.8486

Medium

1.0848

High

1.2045

Boat Specifications

Dimensions

Length overall: 11.97 m
Beam: 3.5 m
Draft: 1.96 m
Displacement: 7219 kg
Crew weight: 681 kg
Wetted surface: 29.43 m²

Sails

Mainsail: 43.64 m²
Genoa: 46.41 m²
Spinnaker: 91.38 m²
Asymmetric spinnaker: 88.63 m²

Design

Type: CROWN 39
Builder: Finngulf Marine
Designer: Håkan Södergren
Year built: 1986

Performance data

Polar CSV

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

6,42.8,4.851922,52,5.41,60,5.71,75,5.98,90,5.93,110,5.68,120,5.49,135,4.94,145,4.382581,150,4.14
8,41.2,5.635189,52,6.38,60,6.67,75,6.86,90,6.87,110,6.82,120,6.64,135,6.02,150,5.207699
10,41.2,6.313006,52,6.94,60,7.12,75,7.26,90,7.31,110,7.37,120,7.27,135,6.91,150,6.14,151,6.082644
12,39.9,6.530536,52,7.16,60,7.34,75,7.5,90,7.58,110,7.71,120,7.64,135,7.38,150,6.93,156.5,6.629882
14,39,6.613944,52,7.26,60,7.44,75,7.68,90,7.8,110,8.04,120,7.98,135,7.72,150,7.37,180,6.73
16,38.6,6.653696,52,7.31,60,7.5,75,7.8,90,8.01,110,8.35,120,8.35,135,8.07,150,7.69,180,7.23
20,38.4,6.673528,52,7.33,60,7.55,75,7.93,90,8.35,110,8.7,120,9,135,8.85,150,8.38,180,7.87

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.41	5.71	5.98	5.93	5.68	5.49	4.94	4.14
8	6.38	6.67	6.86	6.87	6.82	6.64	6.02	5.21
10	6.94	7.12	7.26	7.31	7.37	7.27	6.91	6.14
12	7.16	7.34	7.5	7.58	7.71	7.64	7.38	6.93
14	7.26	7.44	7.68	7.8	8.04	7.98	7.72	7.37
16	7.31	7.5	7.8	8.01	8.35	8.35	8.07	7.69
20	7.33	7.55	7.93	8.35	8.7	9	8.85	8.38

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	3.56	145°	3.59
8	41.2°	4.24	150°	4.51
10	41.2°	4.75	151°	5.32
12	39.9°	5.01	156.5°	6.08
14	39°	5.14	180°	6.73
16	38.6°	5.2	180°	7.23
20	38.4°	5.23	180°	7.87

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°	5.41	6.38	6.94	7.16	7.26	7.31	7.33
60°	5.71	6.67	7.12	7.34	7.44	7.50	7.55
75°	5.98	6.86	7.26	7.50	7.68	7.80	7.93
90°	5.93	6.87	7.31	7.58	7.80	8.01	8.35
110°	5.68	6.82	7.37	7.71	8.04	8.35	8.70
120°	5.49	6.64	7.27	7.64	7.98	8.35	9.00
135°	4.94	6.02	6.91	7.38	7.72	8.07	8.85
150°	4.14	5.21	6.14	6.93	7.37	7.69	8.38