OCTOPUS: ORC Rating

GPH

742.3

OSN

720.3

LOA

8.287 m

Displacement

2522 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5578

Medium

0.7516

High

0.8505

Triple Offshore

Low

0.714

Medium

0.9093

High

1.0029

Boat Specifications

Dimensions

Length overall: 8.287 m
Beam: 2.76 m
Draft: 1.44 m
Displacement: 2522 kg
Crew weight: 399 kg
Wetted surface: 14.79 m²

Sails

Mainsail: 15.16 m²
Genoa: 22.23 m²
Spinnaker: 64.64 m²
Asymmetric spinnaker: 0 m²

Design

Type: Granada 27 SD
Builder: Gesten
Designer: Elvström/Kjaerulff
Year built: 1976
Stability index: 107.9

Performance data

Polar CSV

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

6,42.6,3.871772,52,4.33,60,4.56,75,4.71,90,4.79,110,4.97,120,4.8,135,4.38,148.4,3.851,150,3.79
8,41.2,4.505493,52,5.11,60,5.37,75,5.51,90,5.68,110,5.82,120,5.76,135,5.39,150,4.71,152,4.632212
10,41.8,5.137657,52,5.6,60,5.75,75,5.87,90,6.03,110,6.2,120,6.17,135,5.99,150,5.57,152.9,5.436902
12,39.4,5.357603,52,5.83,60,5.96,75,6.08,90,6.17,110,6.5,120,6.51,135,6.32,150,6.04,164.6,5.673712
14,38.7,5.445713,52,5.96,60,6.1,75,6.26,90,6.32,110,6.72,120,6.84,135,6.68,150,6.34,177.2,5.917064
16,38.2,5.471734,52,6.01,60,6.18,75,6.41,90,6.52,110,6.88,120,7.11,135,7.04,150,6.67,179,6.210946
20,39.4,5.512896,52,6.03,60,6.22,75,6.58,90,6.86,110,7.12,120,7.4,135,7.67,150,7.33,177.2,6.81814

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.33	4.56	4.71	4.79	4.97	4.8	4.38	3.79
8	5.11	5.37	5.51	5.68	5.82	5.76	5.39	4.71
10	5.6	5.75	5.87	6.03	6.2	6.17	5.99	5.57
12	5.83	5.96	6.08	6.17	6.5	6.51	6.32	6.04
14	5.96	6.1	6.26	6.32	6.72	6.84	6.68	6.34
16	6.01	6.18	6.41	6.52	6.88	7.11	7.04	6.67
20	6.03	6.22	6.58	6.86	7.12	7.4	7.67	7.33

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.6°	2.85	148.4°	3.28
8	41.2°	3.39	152°	4.09
10	41.8°	3.83	152.9°	4.84
12	39.4°	4.14	164.6°	5.47
14	38.7°	4.25	177.2°	5.91
16	38.2°	4.3	179°	6.21
20	39.4°	4.26	177.2°	6.81

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°	4.33	5.11	5.60	5.83	5.96	6.01	6.03
60°	4.56	5.37	5.75	5.96	6.10	6.18	6.22
75°	4.71	5.51	5.87	6.08	6.26	6.41	6.58
90°	4.79	5.68	6.03	6.17	6.32	6.52	6.86
110°	4.97	5.82	6.20	6.50	6.72	6.88	7.12
120°	4.80	5.76	6.17	6.51	6.84	7.11	7.40
135°	4.38	5.39	5.99	6.32	6.68	7.04	7.67
150°	3.79	4.71	5.57	6.04	6.34	6.67	7.33