ALTER FOX — ORC Rating

GPH

592.4

OSN

577.2

LOA

9.12 m

Displacement

2799 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7

Medium

0.9151

High

1.0487

Triple Offshore

Low

0.8985

Medium

1.1314

High

1.2916

Boat Specifications

Dimensions

Length overall: 9.12 m
Beam: 3.26 m
Draft: 2.17 m
Displacement: 2799 kg
Crew weight: 360 kg
Wetted surface: 20.98 m²

Sails

Mainsail: 34.48 m²
Genoa: 28.03 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 99.95 m²

Design

Type: Dehler 30 OD
Builder: Dehler Yachts
Designer: Judel/Vrolijk
Year built: 2019

Velocity Prediction

Polar CSV

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

6,41.8,5.057172,52,5.64,60,6,75,6.3,90,6.35,110,6.02,120,5.87,135,5.26,143.7,4.789508,150,4.45
8,39.7,5.848717,52,6.51,60,6.78,75,7.02,90,7.1,110,7,120,6.93,135,6.5,147.8,5.743369,150,5.61
10,37.8,6.251938,52,6.95,60,7.13,75,7.45,90,7.64,110,7.65,120,7.62,135,7.28,148.9,6.633444,150,6.56
12,37.3,6.474132,52,7.2,60,7.41,75,7.76,90,8.13,110,8.22,120,8.32,135,7.96,149.8,7.243067,150,7.23
14,36.8,6.581483,52,7.33,60,7.6,75,7.99,90,8.51,110,8.71,120,9.02,135,8.72,147.5,7.991544,150,7.78
16,36.6,6.651574,52,7.43,60,7.74,75,8.23,90,8.8,110,9.39,120,9.64,135,9.63,145,8.911654,150,8.43
20,36.8,6.718858,52,7.55,60,7.91,75,8.55,90,9.24,110,10.66,120,10.74,135,12.11,141.7,11.379038,150,10.31
24,38.4,6.775608,52,7.57,60,7.95,75,8.71,90,9.7,110,11.78,120,13.05,135,14.56,144.6,14.881102,150,14.01

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.64	6	6.3	6.35	6.02	5.87	5.26	4.45
8	6.51	6.78	7.02	7.1	7	6.93	6.5	5.61
10	6.95	7.13	7.45	7.64	7.65	7.62	7.28	6.56
12	7.2	7.41	7.76	8.13	8.22	8.32	7.96	7.23
14	7.33	7.6	7.99	8.51	8.71	9.02	8.72	7.78
16	7.43	7.74	8.23	8.8	9.39	9.64	9.63	8.43
20	7.55	7.91	8.55	9.24	10.66	10.74	12.11	10.31
24	7.57	7.95	8.71	9.7	11.78	13.05	14.56	14.01

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	41.8°	3.77	143.7°	3.86
8	39.7°	4.5	147.8°	4.86
10	37.8°	4.94	148.9°	5.68
12	37.3°	5.15	149.8°	6.26
14	36.8°	5.27	147.5°	6.74
16	36.6°	5.34	145°	7.3
20	36.8°	5.38	141.7°	8.93
24	38.4°	5.31	144.6°	12.13

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