I don't know anything about a box anchor,. Come to think of it, I don't
really know much of anything about an anchor at all.

When I aquired my Marquis cuddie, The people that had it before me used
to fish on Lake Erie a lot, and they had one of these :

http://thumbs.dreamstime.com/thumb_6...3583VKi1TY.jpg

They just had it sitting in the transom of the boat.

With exception of the wide cross bar, it's identical. It probably
weighs about 30-35 lbs. and I don't have any use for it, seeing the
places I'll be going, there really isn't any current, and I really
don't have a need to lock down.

One thing I've always wondered, though, is a large carrier, or
battleship. if they drop anchor and it gets snagged what do they do?,
of course that much weight will probably crash though abotu anything it
hits, and they probably have enough winch power to pull it though about
anything it snags , but I've always wondered what would happen if they
couldn't get it loose?

Cut the chain???