[The one surface comment is mainly an internal exercise base on leaning toward the thought that the deck and the hull have a relationship that can be explored. Its really irrelevant to the use of the boat and what it is.]
Lapstrake for sure is the endgame for the Oseberg derivative. What I have been working on is a fully proportioned strake to strake and hood end system that matches what I think
one ideal setup might have been. So that's been done as a minimal first step, the next steps are more detailed and onerous to derive and draw lapstrake panel shapes.
The Oseberg drawing above will now give edge to edge panels like a S&G, but as lapstrake panels are tipped [in order to overlap] they have slightly different curvatures [and obviously widths for the overlap] than the S&G version shown. Some boat designers just show forms that the builders then derive the strakes from themselves [called spiling], some just show the S&G approach with an additional overlap added [ply rabbeting], my inclination is to get a more accurate representation of the tipped panel as well as the strake end changes at the 'gain' areas. I've done it for some other boats, but Oseberg is a little more challenging because of the strake number and the hood end shaping.
To me it's fun - but only in small steps!!
Here's a small 15' fully developed lapstrake derivative of one type of traditional russian boat [I'm a traditional russian boat fan!] called a 'shnjaka':
[the program I'm using is allowing bleed-thru of the overlaps and rib locations, so although accurately modelled, is not giving a true rendering of the situation]
**
Relating lapstrake to kayaks, I think it's fairly obvious that the 'sanguine' rec kayak, shown farther up the page, would work fairly well lapstraked, but would add an unnecessary complexity [detail design let alone aesthetics] dimension to an already articulated shape.
However, here's one [surfeit] from quite some time ago that is a natural for partial lapstraking. The three front deck 'leaves' simply overlap each other and also overlap the flush rear deck panels to make an interesting composition contrast [to my mind]:
**
Edited to add later:
In addition, there is another lapstrake kayak that I had been working on [hull exterior is glassed and deck ready for glassing] that is quite odd. [You can maybe discern relationships to ‘surfeit’ and ‘interlude’]
This drawing is not that great, but every seam you see is lapstraked and the hull bottom you can’t see is flush but with the seams exaggerated to be coherent with all the other lapstraking. Probably the most difficult kayak I’ve done with lots of situations I would attempt to change in another rendition as this was the first time trying [and failing to a degree] some of the odd stuff. Much reverse lapstraking [a natural outcome of deck-hull coordination]as well a whole bunch of situations where an overlap changes over the stakes length to become an underlap – it actually makes sense! The stern-tail was unbelievably difficult [another case of the deck being required to become the hull – sort of an emerging chrysalid form] and one of the hull panels under had to twist 90 deg in less than 6 inches at the bow – and of course what happens under matches what happens over. A lapstrake kayak longboard in one sense, a test-bed in another but probably a folly to most!
As usual, I built a ¼ full size model first and that really assisted in the build.
The design approach with both above kayaks is called ‘expressionistic lapstrake’ [lapstrake expressionism] where the panel shapes attempt to express the environment or movement of the kayaks by their form.