Zeppelin and a tower used to man it. We were taking inspiration from this photo [Last photo in the gallery]
Here's description of this photo:
From the British periodical "War in the Air - Aerial Wonders of Our Time", 1936. The accompanying caption reads: PASSENGERS' ENTRANCE TO R101 When R101 was moored to her Cardington mast - 200 feet high, and equipped with a lift and staircase - the passengers and crew entered and left the ship via the mast itself and a gangway let down from beneath her nose. Above is a party of M.P.s entering R101 on an inspection visit. Photo is uncredited.
And a link to it: