How flying-boat squadrons fit into the command chain

What was the chain of command for flying-boat squadrons?

They rose from squadron through wing and group to Coastal Area or Coastal Command, though some peacetime layers were more administrative than operational.

The formal chain rose from squadron commander through wing and group to Coastal Area or Coastal Command. The administrative diagram could exceed the force actually deployed, particularly when an overseas station held little more than a flight's worth of aircraft. Wartime expansion made the higher command levels more definite because enough aircraft and units existed to sustain them.