Little bit of a rule breaker but then again from I understood it just said carrier aircraft. Well the E14Y1 flew off a carrier type I-29 sub that had a hanger bay.
Arado Ar 231, designed for U-boat use (prototype built)
Flettner Fl 282 Kolibri, designed fo ASW work.
Foche-Achgelis Fa 330 Bachstelze, used on U-boats for observation.