Incidentally, your "Seacat" is the F4F-3S Wildcatfish.
I can't remember the Japanese designation of the float Zeke, but the American codename was "Rufe."
I think the PBY would be the better and more practical place to start with float planes and flying boats.
Oh! I thought of another (historical) way to use her: Pilot rescue!
Say you get shot down and decide to bail rather than take the death. Well, right now if you're in enemy territory you can either walk home or take the capture. But wait! What's that? A PBY! Give players a "flare" gun as well as the .45 (say, make it selectable for primary fire) when on the ground to call in the Cat, and all you have to do is climb on board, allowing you to tower out as a "bailed" in friendly territory, or add a new condition of "Rescued." That could even be a special stat to track for pilots, the number of downed friendlies they've picked up on the ground (see something like, SYSTEM: So-and-so landed 15 rescues in a PBY-5A).