What is the Naval abbreviation for Submarine Sonar Technician?

The designation for my old rate is "STS", which literally stands for "Sonar Technician, Submarines". Yours truly was an STS1/SS during the top years of the Cold War. Check my bio page for pics.

The Submarine Sonar community is an oddity in the Navy in that it is separate from the Surface Sonar community, though both share the same rate insignia and Naval lineage. Both have similar missions concerning ASW, but Submarine Sonar and Sonar Tech operations aboard a submarine are critical to submarine operations, whereas it's an ancillary function aboard a surface ship.

The rate insignia is denoted by a pair of headphones.

The surface equivalent, "STG", stands for "Sonar Technician, Guns".