|(Dickson et al, 2013)|
European logboats have continuity to the modern day. The only real difference is that the massive oaks once available no longer exist, so modern logboats are much smaller than their sea going ancestors. The paper just hit the net even though the abstract is dated 2013.
More on caulking sewn-plank and logboats [link] and [link]
Mosses Used for Caulking the Early Bronze Age Logboat from Degersee, Southern Germany Dickson, Maier, Mainberger, Lecrivain (2013) [Link]