>>6181184 (pb)

>>6181243 (pb)

Dig on location of EP3E flyover pattern and missile launch off Whidbey Is: the Triangle of Fire.

Three forts (Worden, Casey, Flagler) historically had cannon embankments covering the primary entrance to the Puget Sound, Admiralty Inlet.

https://www.historylink.org/File/7524

Any submarine traffic out of Bangor (or otherwise) would also have to go through this channel to enter/exit as well. Note the callsign DEEPC20