The Seabird Association



Rigging Dimension Guide
Before replacing standing or running rigging, it is most important that existing dimensions are checked
Shrouds from neck of eye to back of thimble 13ft. 3ins.
Splice to masthead 2 1/2 ins. diameter
Fore Stay as above 14ft. 2ins.
Main Halyard 7/8ins. flex steel 13ft.3ins OA
Downhaul 1 1/4 ins. circum. 32ft. 0ins.
Purchase 1 1/4 ins. circum. 10ft. 0ins.
Spectra Rope 6mm Min.
Jib Halyard 1 1/4 ins. circum. 36ft. 0ins.
Main Sheet 1 1/4 ins. circum. 60ft 0ins. or 45ft. 0ins.
Jib Sheet 1 1/4 ins. circum. each part 15ft 0ins.
Centreboard purchase (Strop 3ft.) 20ft. 0ins.
Topping Lift 1 1/4 ins. circum. 35ft 0ins.
Spinnaker Halyard 1ins. circum. 30ft 0ins.
Spinnaker Guy 1ins. circum. 18ft 0ins.
Anchor Minimum 6kg
Anchor Chain 16mm (1/4ins.) small link 30m
Flag sizes House flag hoist 12ins.
fly 18ins.
Racing Burgee hoist 8ins.
fly 12ins.

Seabird Half Rater Sail Plan
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Length overall: 20 ft.
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Length on load water line: 16 ft. 4in.
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Beam at deck: 6 ft.
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Beam at load water line: 5 ft. 6in.
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Draft: 1 ft. 3in.
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Sail area: 182.2sq. ft.
Full boat & rigging specification can be found in the Members Area