OK… bit on the full set of rules…. here is my 5 minute look.
158 page PDF, about half of which is ship sheets, 1 per page
Scale of description choice appears to be 1/300 as War Artisan ships are featured in a lot of pictures.
I have not looked at the firing or sailing rules in detail yet, but it looks like:
each gun is represented by type on the ship sheet – 1 gun per representation.
Damage appears to be by a manner similar to Leviathan/Crimson Skys, in that it looks like first you find where along the hull your round hit, then you penetrate a certain number of boxes, determined by range and round size. For example, the Erie sloop Little Belt is 18 boxes long and 6 boxes wide.
Jury is still out but I have been looking for a gun by gun game for the Great Lakes and this may work.
There is a paragraph or so on each of boats and shore batteries, but not in much detail.