JAM JAM: ORC Rating

GPH

737

OSN

717.5

LOA

8.742 m

Displacement

3175 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5532

Medium

0.7457

High

0.8406

Triple Offshore

Low

0.7133

Medium

0.9202

High

1.0108

Boat Specifications

Dimensions

Length overall: 8.742 m
Beam: 3.11 m
Draft: 1.48 m
Displacement: 3175 kg
Crew weight: 480 kg
Wetted surface: 17.55 m²

Sails

Mainsail: 17.52 m²
Genoa: 32.41 m²
Spinnaker: 57.79 m²
Asymmetric spinnaker: 51.7 m²

Design

Type: Morgan 27
Designer: MORGAN
Year built: 1972

Performance data

Polar CSV

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

6,43.9,4.024697,52,4.46,60,4.73,75,4.93,90,4.86,110,4.75,120,4.62,135,4.21,147.5,3.711207,150,3.61
8,43.5,4.783737,52,5.3,60,5.6,75,5.81,90,5.77,110,5.8,120,5.67,135,5.19,150,4.57,151,4.527682
10,42.4,5.294836,52,5.85,60,6.04,75,6.19,90,6.23,110,6.33,120,6.27,135,6.01,150,5.41,152,5.323079
12,42.4,5.538588,52,6.03,60,6.22,75,6.4,90,6.46,110,6.64,120,6.62,135,6.41,150,6.07,159.5,5.733062
14,42,5.597832,52,6.09,60,6.29,75,6.53,90,6.66,110,6.91,120,6.94,135,6.73,150,6.43,180,5.96
16,41.6,5.589744,52,6.12,60,6.31,75,6.59,90,6.83,110,7.14,120,7.25,135,7.08,150,6.72,180,6.34
20,42.8,5.601517,52,6.08,60,6.3,75,6.63,90,7.02,110,7.41,120,7.71,135,7.8,150,7.38,180,6.91

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.46	4.73	4.93	4.86	4.75	4.62	4.21	3.61
8	5.3	5.6	5.81	5.77	5.8	5.67	5.19	4.57
10	5.85	6.04	6.19	6.23	6.33	6.27	6.01	5.41
12	6.03	6.22	6.4	6.46	6.64	6.62	6.41	6.07
14	6.09	6.29	6.53	6.66	6.91	6.94	6.73	6.43
16	6.12	6.31	6.59	6.83	7.14	7.25	7.08	6.72
20	6.08	6.3	6.63	7.02	7.41	7.71	7.8	7.38

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.9°	2.9	147.5°	3.13
8	43.5°	3.47	151°	3.96
10	42.4°	3.91	152°	4.7
12	42.4°	4.09	159.5°	5.37
14	42°	4.16	180°	5.96
16	41.6°	4.18	180°	6.34
20	42.8°	4.11	180°	6.91

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°	4.46	5.30	5.85	6.03	6.09	6.12	6.08
60°	4.73	5.60	6.04	6.22	6.29	6.31	6.30
75°	4.93	5.81	6.19	6.40	6.53	6.59	6.63
90°	4.86	5.77	6.23	6.46	6.66	6.83	7.02
110°	4.75	5.80	6.33	6.64	6.91	7.14	7.41
120°	4.62	5.67	6.27	6.62	6.94	7.25	7.71
135°	4.21	5.19	6.01	6.41	6.73	7.08	7.80
150°	3.61	4.57	5.41	6.07	6.43	6.72	7.38