Zeppelin in a vacuum is not an activated state in the parking lot is always heavier than air (the plane)
because its shell is completely filled with air;
when landing or taking off the vacuum does not need Zeppelin mooring crew and mooring mast, and
landing or take-off itself will be vertical;
change aerostatic lift force can be implemented rapidly by an admission or
release of air from the envelope as before takeoff and landing and in flight;
does not apply expensive gas helium;
Fire safety is ensured by the fact that inside the shell is thin air and no combustible gases.