Katla: ORC Rating

GPH

703.8

OSN

681.2

LOA

8.75 m

Displacement

3645 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5648

Medium

0.7829

High

0.9382

Triple Offshore

Low

0.732

Medium

0.9657

High

1.1097

Boat Specifications

Dimensions

Length overall: 8.75 m
Beam: 3.02 m
Draft: 1.82 m
Displacement: 3645 kg
Crew weight: 526 kg
Wetted surface: 19.59 m²

Sails

Mainsail: 25.17 m²
Genoa: 18.08 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 47.67 m²

Design

Type: Dehler 29
Builder: Dehler
Designer: JUDEL/VROLIJK
Year built: 1997
Stability index: 134

Performance data

Polar CSV

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

6,43.8,4.05952,52,4.48,60,4.73,75,4.9,90,5.12,110,5.08,120,4.89,135,4.38,145.1,3.913909,150,3.71
8,42,4.776996,52,5.34,60,5.61,75,5.8,90,6.12,110,6.12,120,5.93,135,5.37,150,4.69,150.5,4.664759
10,41.2,5.342797,52,5.98,60,6.2,75,6.41,90,6.64,110,6.65,120,6.55,135,6.19,150,5.53,153.8,5.34963
12,40,5.796008,52,6.36,60,6.52,75,6.71,90,6.96,110,6.98,120,6.89,135,6.64,150,6.23,159.2,5.872753
14,38.1,6.036077,52,6.6,60,6.73,75,6.9,90,7.24,110,7.34,120,7.22,135,6.95,150,6.64,173.6,6.138254
16,37.2,6.176792,52,6.74,60,6.9,75,7.06,90,7.45,110,7.72,120,7.59,135,7.28,150,6.93,179,6.530995
20,37,6.235636,52,6.86,60,7.08,75,7.44,90,7.69,110,8.39,120,8.38,135,8.02,150,7.58,179,7.121085

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.48	4.73	4.9	5.12	5.08	4.89	4.38	3.71
8	5.34	5.61	5.8	6.12	6.12	5.93	5.37	4.69
10	5.98	6.2	6.41	6.64	6.65	6.55	6.19	5.53
12	6.36	6.52	6.71	6.96	6.98	6.89	6.64	6.23
14	6.6	6.73	6.9	7.24	7.34	7.22	6.95	6.64
16	6.74	6.9	7.06	7.45	7.72	7.59	7.28	6.93
20	6.86	7.08	7.44	7.69	8.39	8.38	8.02	7.58

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.8°	2.93	145.1°	3.21
8	42°	3.55	150.5°	4.06
10	41.2°	4.02	153.8°	4.8
12	40°	4.44	159.2°	5.49
14	38.1°	4.75	173.6°	6.1
16	37.2°	4.92	179°	6.53
20	37°	4.98	179°	7.12

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°	4.48	5.34	5.98	6.36	6.60	6.74	6.86
60°	4.73	5.61	6.20	6.52	6.73	6.90	7.08
75°	4.90	5.80	6.41	6.71	6.90	7.06	7.44
90°	5.12	6.12	6.64	6.96	7.24	7.45	7.69
110°	5.08	6.12	6.65	6.98	7.34	7.72	8.39
120°	4.89	5.93	6.55	6.89	7.22	7.59	8.38
135°	4.38	5.37	6.19	6.64	6.95	7.28	8.02
150°	3.71	4.69	5.53	6.23	6.64	6.93	7.58