LOLOL I was never on a ship at sea. My specialty was GCA RADAR tech, got sent to NAS Miramar, sposed to be there 2 years (I was in for 6) and in 72, got extended to end of enlistment
There's nothing to sound powered phones. They are a dynamic (electromagnetic) element that generates a tiny current, and that is repeated in the 'phones' end. Damn dear as simple as a pair of tin can phones.
