<< However, a number of boats have chain locker *outboard* drains. The
small (1/4 ID or so) thru-hull fittings are used. Although simply
drilling a 1/8in hole through the hull at the aft lower corner of the
locker will do, the rounded outer lip helps to prevent chipping of the
gel coat and give a more professional seamanlike look. >>
So that placement of the hole is not a mystery and possibly a 'winter
project' of patching if you guess wrong: Shine a trouble light inside the
locker so that you can see where the bottom is through the fibreglass from
the outside. Check the fitting flange and nut to be sure there's adequate
clearance before you drill. You will need to seal the locker so it doesn't
also drain to the bilge if that hasn't already been done.
Bill de Ment P-15 #1044 'Sukoshi'
Eagle, Idaho