HellDiver, in modern terminology a Aviation Machinist Mate is a AD. AMM3/c translates to AD3 now. When I joined the Navy in 1974 we had ADJ and ADR when the rating was split into jet and reciprocating engines. Back in WWII my rating would have been Machinist Mate Motor Auxillary (MMA). In 1949 that was changed to Engineman (EN). A few years ago, they made more major changes to the rating structure combining a bunch and disestablishing others.
NC, I joined that site a couple of years ago, but somehow got my username and password all mucked up to where I can't seem to log on anymore. But I did manage get in contact with several old shipmates. Including a couple that I couldn't stand to be near back in the day :costumes: