Charles, The quick answer is don't flush overboard. It seems like the rules for the Champalin are prety clear. Use a holding tank and remove a portion of the pipeing from it to the thru-hull for overboard discharge. We spent the greater parts of 3 summers on the traditional loop segments in Canada. One summer we cruised Westward from the Erie canal through the Trent-Severn to Lake Michigan, one summer clockwise reversing that route, and a summer on the Rideau. We had a holding tank with a key lock on the circuit which energized the overflow pump. No one asked to see out system. In fact, no one even came aboard. In preperation for a new toilet, friends of ours installed a separate holding tank for the forward head on ACT 2, their Albin 43. elliott bray www.loopcruiser.com/cruise HTH > Date: Thu, 30 Apr 2015 08:54:23 -0400 > From: Nepidae 43 <nepidae.trawler@gmail.com> > To: great-loop@lists.trawlering.com > > > How do you cruise the NDZ's of this country and deal with the > daily bodily functions we must deal with, without having your > boat impounded or being fined? > > > Charles Williamson > m/v Nepidae > Albin 43 Sundeck > Nepidae.trawler@gmail.com > MTOA 3927