For remote are delivery, there is the often ignored issues of replacement mass. Basically, if you deliver 100 tons to some remote location, the airship is now

For remote are delivery, there is the often ignored issues of replacement mass. Basically, if you deliver 100 tons to some remote location, the airship is now 100 tons lighter once you ofload it. Unless you want it to immediatelly shoot up to the stratosphere, you need to rebalance it. You either have tobrelease some of the gas to reduce the lifting force (pretty expensive if you use helium) or load 100 tons of some replacement mass (even if you load 100 tons of local dirt, it can still not be an easy task on a remote location).