(23)
Whatever floats U-Boat?
A Bird? Plane? Submarine!?
Periscope up, up, up...
Ship takes on air.
Skymarine.
Sub-standard flight.
Submarine concept becomes clouded.
Depth charges made redundant.
Silent Sub-duction.
Flying pirates kidnap kids.
Pirates of sea, sky.
Seminal submarine sci-fi.
Pirate submariners loot liner.
Naval submarine pursues aerial.
(4)
Whatever floats U-Boat?