IOESSA: ORC Rating

GPH

721.6

OSN

696.4

LOA

9.98 m

Displacement

5564 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5537

Medium

0.7685

High

0.9035

Triple Offshore

Low

0.7132

Medium

0.9454

High

1.0676

Boat Specifications

Dimensions

Length overall: 9.98 m
Beam: 3.24 m
Draft: 1.74 m
Displacement: 5564 kg
Crew weight: 450 kg
Wetted surface: 24.07 m²

Sails

Mainsail: 21.15 m²
Genoa: 30.78 m²
Spinnaker: 61.26 m²
Asymmetric spinnaker: 0 m²

Design

Type: DISCOVERY 3000EXT
Builder: DROMOR YACHTS
Designer: ED DUBOIS
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.

6,45,4.058793,52,4.45,60,4.72,75,4.88,90,4.78,110,4.82,120,4.67,135,4.21,146.2,3.742549,150,3.59
8,42.9,4.805179,52,5.31,60,5.57,75,5.74,90,5.71,110,5.85,120,5.7,135,5.24,150,4.62,150.1,4.61416
10,41.4,5.305881,52,5.9,60,6.11,75,6.27,90,6.36,110,6.47,120,6.39,135,6.05,150,5.47,153.4,5.312283
12,40.3,5.677435,52,6.26,60,6.42,75,6.57,90,6.69,110,6.82,120,6.77,135,6.55,150,6.14,158.1,5.819992
14,39.4,5.901128,52,6.46,60,6.61,75,6.77,90,6.87,110,7.08,120,7.05,135,6.87,150,6.57,170.9,6.056225
16,39,5.9963,52,6.56,60,6.73,75,6.92,90,6.99,110,7.31,120,7.31,135,7.14,150,6.87,177.7,6.435184
20,38.8,6.03076,52,6.61,60,6.8,75,7.1,90,7.28,110,7.71,120,7.86,135,7.73,150,7.38,179,6.991065
24,39.9,6.009136,52,6.6,60,6.81,75,7.16,90,7.5,110,7.95,120,8.38,135,8.44,150,7.99,178.6,7.482234

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.45	4.72	4.88	4.78	4.82	4.67	4.21	3.59
8	5.31	5.57	5.74	5.71	5.85	5.7	5.24	4.62
10	5.9	6.11	6.27	6.36	6.47	6.39	6.05	5.47
12	6.26	6.42	6.57	6.69	6.82	6.77	6.55	6.14
14	6.46	6.61	6.77	6.87	7.08	7.05	6.87	6.57
16	6.56	6.73	6.92	6.99	7.31	7.31	7.14	6.87
20	6.61	6.8	7.1	7.28	7.71	7.86	7.73	7.38
24	6.6	6.81	7.16	7.5	7.95	8.38	8.44	7.99

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	45°	2.87	146.2°	3.11
8	42.9°	3.52	150.1°	4
10	41.4°	3.98	153.4°	4.75
12	40.3°	4.33	158.1°	5.4
14	39.4°	4.56	170.9°	5.98
16	39°	4.66	177.7°	6.43
20	38.8°	4.7	179°	6.99
24	39.9°	4.61	178.6°	7.48

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°	4.45	5.31	5.90	6.26	6.46	6.56	6.61	6.60
60°	4.72	5.57	6.11	6.42	6.61	6.73	6.80	6.81
75°	4.88	5.74	6.27	6.57	6.77	6.92	7.10	7.16
90°	4.78	5.71	6.36	6.69	6.87	6.99	7.28	7.50
110°	4.82	5.85	6.47	6.82	7.08	7.31	7.71	7.95
120°	4.67	5.70	6.39	6.77	7.05	7.31	7.86	8.38
135°	4.21	5.24	6.05	6.55	6.87	7.14	7.73	8.44
150°	3.59	4.62	5.47	6.14	6.57	6.87	7.38	7.99