Zeppelin

First---I want to say I have always enjoyed this movie since first seeing it some years ago. It explores some aspects of of a (relatively) little-know war i.e. World War I, and especially the use and technology of Zeppelins--which has been rare to non-existent in cinema.

Recently having purchased a video tape of the movie, I noticed something that has raised questions in my mind. In the movie, it is stated more times how critical weight is on a Zeppelin. For instance, when Richter-Douglas is first brought on board, Frau Altschul says "weight is critical on an airship--we haven't allowed for this man!" However, later when the Zeppelin has docked on the ship in the North Sea, a score or more of the men who are the "commandos" board the ship, and nothing is said about extra weight.

The only thing I can surmise is that the men who were to actually perform the commando raid in Scotland replaced the regular Zeppelin crew; who consequently disembarked and were left on the naval ship. If this happened in the movie or was mentioned, did I miss it?