The Westerly Berwick, a masthead sloop, was designed by Laurent Giles and built in the UK by Westerly Marine Ltd.
Underwater Profile: Bilge keels & semi-balanced rudder
Hull Material: GRP (Fibreglass)
Length Overall: 31'0" (9.5m)
Waterline Length: 25'0" (7.6m)
Beam: 9'6" (2.9m)
Draft: 3'7" (1.1m)
Rig Type: Masthead sloop
Displacement: 9,790lb (4,441kg)
Ballast: 4,436lb (2,012kg)
Designer: Laurent Giles
Builder: Westerly Marine Ltd (UK)
Year First Built: 1973
Year Last Built: 1980
Number Built: 309
1. Sail Area/Displacement Ratio: 14.9
2. Ballast/Displacement Ratio: 45.3
3. Displacement/Length Ratio: 280
4. Comfort Ratio: 28.1
5. Capsize Screening Formula: 1.8
Read more about these Key Performance Indicators...
1. A Sail Area/Displacement Ratio of just 14.9 suggests that the Westerly Berwick will need a stiff breeze to get her going. In light conditions, unless you've got plenty of time on your hands, motor-sailing may be the way to go.
2. A Ballast/Displacement Ratio of 45.3 means that the Westerly Berwick will stand up well to her canvas in a blow, helping her to power through the waves.
3. A Displacement/Length Ratio of 280, tells us the Westerly Berwick is clearly a heavy displacement cruising boat. You can load her down with all your cruising gear and equipment and it will hardly affect her waterline. Not an ideal choice for coastal sailing, but she'll come into her own on an offshore passage in testing conditions.
4. Ted Brewer's Comfort Ratio of 28.1 suggests that crew comfort of a Westerly Berwick in a seaway is similar to what you would associate with the motion of a coastal cruiser with moderate stability, which is not the best of news for anyone prone to seasickness.
5. The Capsize Screening Formula (CSF) of 1.8 indicates that a Westerly Berwick would be a safer choice of sailboat for an ocean passage than one with a CSF of more than 2.0.
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