Alternative meaning: Can refer to a "civilian" industrial occupation, testing or troubleshooting electronic systems.

Electronics Technician (ET) is a US Navy enlisted rating or job specialty (often called MOS by other services). ETs are responsible for the electronic equipment used to send and receive messages, detect enemy planes and ships, and determine target distance. They maintain, repair, calibrate, tune, and adjust all electronic equipment used for communications, detection and tracking, recognition and identification, navigation, and electronic countermeasures. The United States Navy (USN) is the branch of the United States armed forces responsible for naval operations. ... Inspecting an F-16 electronic countermeasures pod Electronic countermeasures or ECM are any sort of electrical or electronic device designed entirely to spoof radar, sonar, or other detection systems. ...

ET rating specialty areas

Surface

Surface ETs maintain and repair electronics equipment such as radar, communication and navigation equipment. The ET and FC (AEF) ratings comprise the basis of the ship's Combat Systems department aboard ships and are responsible for maintaining the ship's readiness for combat operations. This long range radar antenna (approximately 40m (130ft) in diameter) rotates on a track to observe activities near the horizon. ... Communication is the process of exchanging information usually via a common system of symbols. ... There are several traditions of navigation. ...

Subsurface Navagation

(Not Open to Women)

Subsurface Navigation ETs are responsible for all operational and administrative aspects of the submarine's navigation and radar equipment, systems and programs.

Subsurface Radio

(Not Open to Women)

Subsurface Radio ETs are responsible for all operational and administrative aspects of the submarine's radio communication equipment, systems and programs, including submarine LAN systems. Lan can stand for several things: A local area network Lan (airline) formerly LanChile Lan Peru Lan Mandragoran, a fictional character in the Wheel of Time series. ...

Nuclear

Nuclear-trained ETs perform duties in nuclear propulsion plants operating reactor control, propulsion and power generation systems. Nuclear ETs may be assigned to modern nuclear powered aircraft carriers or volunteer for submarine service if male. An aircraft carrier is a warship whose main role is to deploy and recover aircraft—in effect acting as a sea-going airbase. ... USS Los Angeles A submarine is a specialized watercraft that can operate underwater. ...