SOB SOB: ORC Rating

GPH

753.5

OSN

732.6

LOA

7.15 m

Displacement

1064 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5486

Medium

0.736

High

0.8215

Triple Offshore

Low

0.7044

Medium

0.8948

High

0.991

Boat Specifications

Dimensions

Length overall: 7.15 m
Beam: 2.52 m
Draft: 1.38 m
Displacement: 1064 kg
Crew weight: 270 kg
Wetted surface: 10.14 m²

Sails

Mainsail: 14.55 m²
Genoa: 12.33 m²
Spinnaker: 27.01 m²
Asymmetric spinnaker: 0 m²

Design

Type: Stag 24
Builder: Mark III
Designer: Taddei
Year built: 1977

Performance data

Polar CSV

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

6,42,3.969617,52,4.48,60,4.71,75,4.88,90,4.82,110,4.8,120,4.62,135,4.09,149,3.534899,150,3.5
8,41.6,4.69378,52,5.22,60,5.39,75,5.51,90,5.58,110,5.59,120,5.48,135,5.02,150,4.4,153.5,4.268469
10,39.8,5.089267,52,5.56,60,5.69,75,5.81,90,5.97,110,6,120,5.91,135,5.66,150,5.21,155,5.009336
12,38.2,5.242685,52,5.75,60,5.9,75,6.07,90,6.31,110,6.41,120,6.31,135,6.03,150,5.72,180,5.23
14,38.2,5.293585,52,5.85,60,6.05,75,6.31,90,6.52,110,6.8,120,6.71,135,6.42,150,6.07,180,5.69
16,38.8,5.337864,52,5.88,60,6.12,75,6.48,90,6.68,110,7.16,120,7.13,135,6.81,150,6.43,180,6.02
20,40.9,5.318491,52,5.84,60,6.12,75,6.59,90,7.04,110,7.68,120,8.13,135,7.77,150,7.18,180,6.71

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.48	4.71	4.88	4.82	4.8	4.62	4.09	3.5
8	5.22	5.39	5.51	5.58	5.59	5.48	5.02	4.4
10	5.56	5.69	5.81	5.97	6	5.91	5.66	5.21
12	5.75	5.9	6.07	6.31	6.41	6.31	6.03	5.72
14	5.85	6.05	6.31	6.52	6.8	6.71	6.42	6.07
16	5.88	6.12	6.48	6.68	7.16	7.13	6.81	6.43
20	5.84	6.12	6.59	7.04	7.68	8.13	7.77	7.18

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42°	2.95	149°	3.03
8	41.6°	3.51	153.5°	3.82
10	39.8°	3.91	155°	4.54
12	38.2°	4.12	180°	5.23
14	38.2°	4.16	180°	5.69
16	38.8°	4.16	180°	6.02
20	40.9°	4.02	180°	6.71

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°	4.48	5.22	5.56	5.75	5.85	5.88	5.84
60°	4.71	5.39	5.69	5.90	6.05	6.12	6.12
75°	4.88	5.51	5.81	6.07	6.31	6.48	6.59
90°	4.82	5.58	5.97	6.31	6.52	6.68	7.04
110°	4.80	5.59	6.00	6.41	6.80	7.16	7.68
120°	4.62	5.48	5.91	6.31	6.71	7.13	8.13
135°	4.09	5.02	5.66	6.03	6.42	6.81	7.77
150°	3.50	4.40	5.21	5.72	6.07	6.43	7.18