Over the years, Debian has been forked a number of times. Some of the more well-known forks are Ubuntu and Knoppix.
The latest release of Debian pure blend was Debian 7.1 "Wheezy" on June 15th 2013.
I've never been canoeing before, but I imagine there must be just a few simple heuristics you have to remember... Yes, don't fall out, and don't hit rocks.