In my past I've done a bit of "sawdust creation". I know a bi about wood, the properties of wood, which woods are nicer to work with, and when to consider a change. The Globe 580 specific clear pine for the frame. This pine is encapsulated in epoxy which secures the wood from water. This is a valid way to build the frames.
There are other woods that are NOT susceptible to water (rot, absorption, etc). You see these woods in barrels and traditional ship building (clinker, plank, strip). the most common of these woods are teak, cedar, mahogany and ... my favorite ... white oak.