This is almost 200 feet long attached to a 700 foot long helium blimp (not hydrogen, so no worries about going Hindenburg). And of course it will separate and become a sea going yacht.

This is unbelievably cool. See the pictures below.

It is only in concept at this point, won’t fly until 2026.

Darnet Design

Meet the AirYacht, a Bonkers Superyacht-Blimp Hybrid Concept That Can Cruise Both Sea and Sky