: the displacement of the guillemot is 215 lbs. also what is the displacement
: of the guillemot-L? how do these two boats compare?
: daren.....
The 215 (265# for the "L"} is the weight in good ol' pounds of the water displaced by the craft when she's "sitting on her lines." Each of these yaks has a design waterline. When loaded to to their designed displacement they should float at this waterline. You're correct in assuming that the load includes the weight of the yak. You can exceed the designed displacement to some extent without compromising performance, but there comes a point where increased drag and decreased freeboard become a problem. You could probably use the standard design for light camping, but for anything extensive you would bump up against your cargo limits.

As a guy who is comfortable in a XX t-shirt and having a high center of gravity, which makes me very popular on the high side of a sailboat, I've been looking at the "L". Nick say's all the the L's dimensions have been increased by about 6%. Well, yes and no.
---------------------Guillemot-----------------Guillemot "L"
Length.....................17'.............................18'
Beam....................20.75".........................23"
Ht. @ Cockpit........11.75.........................13"
Design Disp..........215#.......................265#

But if you study the sections You'll note that there isn't much more fullness below the DWL in the aft four sections of the L compared to the standard. The increase is more dramatic from there forward and some of this increase is carried right up to form 2. So it appears that Nick has placed the new hull displacement with a forward bias 'cause that's where he expects most of the additional weight to end up. So Nick is understating the work and thought that went into this enlargement. He didn't merely scale up the dimensions and let it go at that. For all of me the "L" looks like the weigh :-) to go.