flotation collars on longboat measurements

[gary1]

Morning,
Would anyone be able to tell me the measurements on the flotation collars that are built into their longboats, eg- the width of them and how far they extend down from the gunwhale. Reason being I,m in the process of building a longboat and would like to possibly incorperate this design feature into my boat. I'm especially intrested in the Southern Star Marine style of boat built in Australia but information on them is a bit hard to come across
Thank's
Gary

[jack]

hi
the 22' sth star is the yamaha hull, used in america only with skegs on it
if you go to the old forum there are lots of pics, including the underwater lines
groups.yahoo.com/group/panga_style_boats/

the gunwale flotation is 7 1/2" deep
the width varies ..4" on the side of boat

[gary1]

Thank's Jack I appreciate the help
Stay Safe
Gary