This often includes radar intelligence, acoustic intelligence, nuclear intelligence, and chemical and biological intelligence.

Databases of unique engine sounds are part of what is known as acoustic intelligence or ACINT.

One of the first tales told to new students in sonar school was the value of acoustic intelligence, followed by the "sixty hours of Stonewall Jackson" and her sonar officer, Ben Steel.

In addition to these direct support operations, CTG 168.3/EURFAST operated an Acoustic Intelligence (ACINT) Analysis laboratory and supervised numerous bilateral intelligence agreements with allied European Navies.