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".
A sub spotter is typically called a Submarine Sonar Technician or Sonar Operator. Their role is to detect and locate enemy submarines using sonar technology.
STS1 is my old rate/rank, and one of the best in the Navy if you're on a fast-attack submarine. The STS stands for "Sonar Technician (Submarines) - the 1 is the rank, for First Class Petty Officer. Submarine and Surface Sonar Techs have different rate designations, as their school training pipeline is different. Surface Sonar designation is STG, for Sonar Technician(Guns).
A submarine sonar can be as loud as 235 decibels, which is much louder than a jet engine.
STG is the rate, or job, of that person. In this case, it is a Sonar Technician - Surface. They work on the sonar suite of a surface vessel (ie, a ship). The "C" gives that person's rank, which in this case is a Chief Petty Officer. If it was a Senior Chief Sonar Tech, they would be STGCS. If it were a 3rd Class Petty Officer, they would be STG3. The Sonar Tech rating is actually divided between surface and submarine technicians. STS stand for "Sonar Technician, Submarines", where STG stands for "Sonar Technician, Guns", indicating a surface rate.
SONAR
airborne, surface ship, and submarine-based sonar systems including depth-finding equipment, guidance hydrophones, sonabuoys, sonar fish finders, navigation and mapping sonar, and anti-submarine sonar equipment
Virtually all of the rates stationed there are submarine related. While some rates are crossovers (i.e., they can be surface or air warfare qualified as well), those that are stationed there at the base as instructors or support personnel are Qualified in Submarines. The only exceptions are those going through submarine school itself, or enlisted females on support staff who aren't yet permitted to ride boats. Typical rates: Sonar Technician (Submarines) - Sonar School was moved to Groton years ago from San Diego, which is a shame. The old Fleet ASW Training Center in San Diego was a Sonarman's dream training facility. I did my own stint at Submarine School in February '80 - San Diego was much better on the bones. Machinist's Mate Interior Communications Electrician Electronic Technician (Nav ET/Quartermaster) Electronics Technician Hospital Corpsman (lots in submarine school for screening/evaluation of volunteers) Electrician's Mate Yeoman Fire Control Technician
A submarine's sonar system can potentially harm marine life, but it is unlikely to be fatal to a person.
"Sonar" is an abbreviation from "sound navigation ranging."
sonar
A submarine uses sonar, like a bat uses echolocation to see.
No, submarine sonar cannot kill you. It is a technology used for detecting objects underwater and does not emit harmful levels of sound that could cause harm to humans.