Slitherine

In the editor you can put a float plane recon unit in a support ship. Nice.
But when you select the support ship during a game, the float plane is not visible/aboard.
If you use the next unit you'll eventually reach the float plane and can launch it.

The "repair_ship" is in the cruiser class that usually supports recon planes. Same as the "lightcruiser".

But: Both do not have a "cargo" entry, so landing and launching should not be possible during play. You "cheated" using the editor for that. But yeah, sounds like a bug.