Follow Me: ORC Rating

GPH

784.1

OSN

754.2

LOA

8.6 m

Displacement

3274 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.4989

Medium

0.7054

High

0.8495

Triple Offshore

Low

0.6445

Medium

0.8742

High

1.009

Boat Specifications

Dimensions

Length overall: 8.6 m
Beam: 2.94 m
Draft: 1.58 m
Displacement: 3274 kg
Crew weight: 407 kg
Wetted surface: 18.35 m²

Sails

Mainsail: 17.09 m²
Genoa: 23.73 m²
Spinnaker: 41.84 m²
Asymmetric spinnaker: 0 m²

Design

Type: Gib Sea 28
Builder: Gibert Marine
Designer: Joubert
Year built: 1978

Performance data

Polar CSV

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

6,45.5,3.638131,52,3.97,60,4.23,75,4.39,90,4.3,110,4.38,120,4.23,135,3.78,147.3,3.351116,150,3.26
8,43.9,4.385532,52,4.83,60,5.09,75,5.26,90,5.29,110,5.38,120,5.24,135,4.77,150,4.22,150.7,4.196914
10,42.7,4.912135,52,5.43,60,5.66,75,5.83,90,5.95,110,6.04,120,5.94,135,5.57,150,5.03,154.1,4.869059
12,41.6,5.282174,52,5.81,60,5.99,75,6.15,90,6.31,110,6.41,120,6.33,135,6.1,150,5.7,158.8,5.384395
14,40.1,5.516907,52,6.05,60,6.21,75,6.37,90,6.56,110,6.7,120,6.63,135,6.43,150,6.14,172.2,5.632109
16,39.2,5.664922,52,6.21,60,6.36,75,6.55,90,6.74,110,6.97,120,6.91,135,6.72,150,6.45,178.1,6.033317
20,39.3,5.776386,52,6.33,60,6.53,75,6.82,90,6.95,110,7.42,120,7.44,135,7.28,150,6.98,179,6.601005
24,40.9,5.781544,52,6.32,60,6.55,75,6.95,90,7.22,110,7.78,120,7.99,135,7.89,150,7.5,179,7.09108

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	3.97	4.23	4.39	4.3	4.38	4.23	3.78	3.26
8	4.83	5.09	5.26	5.29	5.38	5.24	4.77	4.22
10	5.43	5.66	5.83	5.95	6.04	5.94	5.57	5.03
12	5.81	5.99	6.15	6.31	6.41	6.33	6.1	5.7
14	6.05	6.21	6.37	6.56	6.7	6.63	6.43	6.14
16	6.21	6.36	6.55	6.74	6.97	6.91	6.72	6.45
20	6.33	6.53	6.82	6.95	7.42	7.44	7.28	6.98
24	6.32	6.55	6.95	7.22	7.78	7.99	7.89	7.5

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	45.5°	2.55	147.3°	2.82
8	43.9°	3.16	150.7°	3.66
10	42.7°	3.61	154.1°	4.38
12	41.6°	3.95	158.8°	5.02
14	40.1°	4.22	172.2°	5.58
16	39.2°	4.39	178.1°	6.03
20	39.3°	4.47	179°	6.6
24	40.9°	4.37	179°	7.09

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°	3.97	4.83	5.43	5.81	6.05	6.21	6.33	6.32
60°	4.23	5.09	5.66	5.99	6.21	6.36	6.53	6.55
75°	4.39	5.26	5.83	6.15	6.37	6.55	6.82	6.95
90°	4.30	5.29	5.95	6.31	6.56	6.74	6.95	7.22
110°	4.38	5.38	6.04	6.41	6.70	6.97	7.42	7.78
120°	4.23	5.24	5.94	6.33	6.63	6.91	7.44	7.99
135°	3.78	4.77	5.57	6.10	6.43	6.72	7.28	7.89
150°	3.26	4.22	5.03	5.70	6.14	6.45	6.98	7.50