Amphirite: ORC Rating

GPH

614.3

OSN

595.1

LOA

13.21 m

Displacement

10000 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6371

Medium

0.889

High

1.0381

Triple Offshore

Low

0.832

Medium

1.1134

High

1.2596

Boat Specifications

Dimensions

Length overall: 13.21 m
Beam: 3.9 m
Draft: 2.13 m
Displacement: 10000 kg
Crew weight: 550 kg
Wetted surface: 38.3 m²

Sails

Mainsail: 53.52 m²
Genoa: 34.27 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 128.66 m²

Design

Type: Dehler 43 cws
Builder: Dehler
Designer: Van De Stadt
Year built: 1992
Stability index: 120.4

Performance data

Polar CSV

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

6,44.2,4.533341,52,5.04,60,5.36,75,5.61,90,5.84,110,5.88,120,5.7,135,5.01,143.3,4.564868,150,4.22
8,42.3,5.408101,52,6.05,60,6.37,75,6.64,90,7.05,110,7.15,120,6.96,135,6.3,146.9,5.526915,150,5.35
10,41.4,6.105762,52,6.86,60,7.16,75,7.39,90,7.75,110,7.85,120,7.75,135,7.34,146,6.69451,150,6.41
12,41.1,6.701493,52,7.4,60,7.62,75,7.79,90,8.05,110,8.25,120,8.18,135,7.9,148.7,7.361385,150,7.26
14,40,6.931713,52,7.65,60,7.85,75,8.04,90,8.21,110,8.62,120,8.58,135,8.29,150,7.74,150.5,7.709492
16,39.4,7.01406,52,7.76,60,7.98,75,8.23,90,8.34,110,8.91,120,9.01,135,8.7,150,8.05,171.8,7.244062
20,39,7.051442,52,7.83,60,8.07,75,8.47,90,8.78,110,9.31,120,9.73,135,9.61,150,8.63,177.2,8.009562

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.04	5.36	5.61	5.84	5.88	5.7	5.01	4.22
8	6.05	6.37	6.64	7.05	7.15	6.96	6.3	5.35
10	6.86	7.16	7.39	7.75	7.85	7.75	7.34	6.41
12	7.4	7.62	7.79	8.05	8.25	8.18	7.9	7.26
14	7.65	7.85	8.04	8.21	8.62	8.58	8.29	7.74
16	7.76	7.98	8.23	8.34	8.91	9.01	8.7	8.05
20	7.83	8.07	8.47	8.78	9.31	9.73	9.61	8.63

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44.2°	3.25	143.3°	3.66
8	42.3°	4	146.9°	4.63
10	41.4°	4.58	146°	5.55
12	41.1°	5.05	148.7°	6.29
14	40°	5.31	150.5°	6.71
16	39.4°	5.42	171.8°	7.17
20	39°	5.48	177.2°	8

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°	5.04	6.05	6.86	7.40	7.65	7.76	7.83
60°	5.36	6.37	7.16	7.62	7.85	7.98	8.07
75°	5.61	6.64	7.39	7.79	8.04	8.23	8.47
90°	5.84	7.05	7.75	8.05	8.21	8.34	8.78
110°	5.88	7.15	7.85	8.25	8.62	8.91	9.31
120°	5.70	6.96	7.75	8.18	8.58	9.01	9.73
135°	5.01	6.30	7.34	7.90	8.29	8.70	9.61
150°	4.22	5.35	6.41	7.26	7.74	8.05	8.63