Assertion: centerboard | /r/CapableOf | swing up to useful 4′ 2″ of draft
Facets:
value: from 7′ 9″
type: OTHER
value: in shoal waters
type: LOCATION
Source sentences:
text: Below the waterline most boats have the centerboard option which entails a long and shallow fin keel, with a centerboard that swings up from 7′ 9″ to a useful 4′ 2″ of draft in shoal waters.