This set provides a nice top-down view of a trim galley with a couple of sails to supplement the single bank of oars. The vessel is fully-decked so you don't get to see the rowing benches below, nor any of the living accommodations.
The plan is at a 1" = 5 feet scale with a square grid. This makes a nice size for miniatures use but, despite the 'product blurb' warning that alternate scales are available so to make sure you purchase the one you need, you don't get to find this out until you have bought it! It also appears to be the single version available, at least here on DriveThruRPG.
Instructions for use are clear and straightforward. There are two bonus tiles provided. One is just sea and the other is a beach. Both could be printed repeatedly should you need more to lay out the scene that you require.
It's very attractive and should a sea battle with elves (or anyone else owning an elegant war galley) be in your plot it would be a nice image to put before your players.