Originally Posted by
Tengah Type
For anybody wishing to read the background to the employment (misemployment?) of Air Gunners I can recommend Wg Cdr Jeff Jefford's excellent book
Observers and Navigators and other non-pilot aircrew in the RFC, RNAS, and RAF. It covers the whole history of that period.
If I could add that you need to get the much expanded second edition (white cover) rather than the 1st edition (blue cover).