Most any 16-18'
dinghy should have a light enough
mast that if it's on a tabernacle it should be easy enough to drop. We used to putter around in a 18'
centerboard something-or-other and if the railroad bridge wouldn't open, I'd just go forward, release the pelican hook on the forestay, and the wife &
kids would catch the rig. Sometimes we didn't even have time to drop the
sails, but the whole Chinese fire drill would only take a couple of minutes.