"Ian Malcolm" wrote in message
...
For a pivoting board (ie. proper centreboard, not a daggerboard) most
sailing dinghy designs have a slot gasket. This consists of two strips
either side of the slot that cover it when the board is up and prevent
too much water slopping up the case when the board is partially or fully
down. In a chop, an ungasketed case can deliver water fast enough to
require continuous bailing.
snip



More excellent advice - thanks.

--
Andrew Butchart

http://www.floatingbear.ca