"The \"Don\"" wrote in message . ..
I am trying to find out how the length of a boat is determined for
registering. Is it from the bow to the stern including the pulpit and
the swim platform? What if the swim platform is not "fixed" (moves up
and down) to the hull. This is for Canadian Waters

You could also measure it by the International Tonnage Convention of
1969.

Basically the greater length of either stem to centre of ruddder stock
or 96% of the waterline length at the waterline at 85% of the least
molded depth. Means with a vertical stem and Titanic style cruiser
stern a vessel can be longer than 24m overall, but less than 24m under
this convention. In fact one can get away with about an extra 90cm of
boat length.