Why is this an important distinction though? Zeppelins still need to be full anyway in order to float, so why does it matter that they keep their shape when not full?
All Zeppelins are airships but not all airships are zeppelins. Iirc the term ”Zeppelin” is used for rigid-frame airships only. The term usually used for non-rigid ships is ”blimp”.
So aside from the fact that this is a hybrid that needs power to lift, it’s also a Blimp rather than a Zeppelin.
