I have two of the Chariot carriers, one a two-kid version with plastic spoke wheels, and the older, slightly larger one that is the "converting to a jogger" version with support bars running on the outsides (handy if it rolls when empty on a sharp corner).
I also have one of these older inline trailers: http://www.tomswenson.com/bob.htm
( a review with a picture)
I would take none of these on a boat for long-term cruising. The volume penalty is too high and there are easily corroded parts on all of them. I would instead do the following:
1) Purchase a set of front and rear pannier frames made for the standard 26 inch mountain bike. They need to be steel for strength.
2) Paint them thickly in two-part epoxy for maximum resistance to corrosion.
3) Duplicate their clamps, pins and bolts/nuts so I'm never short of spares.
4) Buy light, tough nylon pannier bags that can be locked to the bike or to the frame. Get the type that can be carried easily in the hands when off the bike.
5) Bring a crappy, fat-tire mountain bike and spray it down with Boeshield or whatever. Wrap it in tarp and leave it on the rail. Make sure it's the quick-release type that can break down (but NOT a folder...too weak usually and too small)
6) When at the destination where one needs a bike, assemble panniers. Take ashore. Shop. Tour via bike.
7) When bike gets too corroded, remove pannier frames and sell locally for ten bucks or whatever, or trade for old but uncorroded similar cheap mountain bike. If none is available, buy bike at next stop and sell bike before you leave.
My point is that you spend money and stowage on the panniers and bags, not the bike, on the reasonable assumption that there will always be at least an adequate bike nearby, rather than bringing "your" bike (a magnet for thieves and a magnet for rust that *won't* arrive uncruddy having spent two months on deck). Not only is this more sensible (roads in the developing world rarely conducive to wind sprints), it saves space, provides protective colouration (you'll have a crappy local bike the same as everyone else), and makes you a good yachtie when you sell the bike back into the local economy at a slight "loss" (who cares when we are talking $20 for maybe a hurricane season's worth of local transport?)
And you keep the excellent, modded for sea time panniers and frames.