: Don't forget to add in the weight of the kayak as weight that will displace
: the water.

: If you, your kayak, and gear all weigh 215 lbs, you'll sink to the level of
: WL=0. There is also a sinkage number given in lbs/inch ratio that for any
: given additional weight you can figure out how much farther you'll sink.

Here is another consideration that I never really thought about until recently, and mentioned to a marine engineer ... that is the salinity of the water. As expected, vessels will hold more (weight) in salt water than fresh. It might at first seem trivial, but in reality he said that it is material, as boats going up a river fed bay have to do some serious calculations about how much water they are drawing as the salinity changes. Anyone ever notice this in a kayak?