The Cryptologic Technician Technical (CTT) rating:
Cryptologic Technician Technical (CTT). CTTs perform a variety of technically-intensive duties, both afloat and ashore, associated with processing and interpreting RADAR emissions for tactical and strategic value. They operate Electronic Intelligence (ELINT)/Electronic Support (ES) receiving/processing systems and peripheral equipment to provide threat assessments, situational awareness and Indications and Warnings (I&W) in addition to formulating Electronic Attack (EA) techniques and tactics. Additionally, CTTs record and analyze RADAR data to develop and maintain RADAR libraries for strategic analysis and development of deception techniques. They operate and maintain ES and EA systems permanently installed on ships. CTTs perform their duties on ships, submarines, aircraft, patrol craft and at shore commands in the U.S. and overseas. CTTs also augment U.S. Special Operations Forces and Expeditionary Warfare forces abroad.
Source: Navy Learning and Development Roadmap.
Station HYPO 
6 October 2022 at 08:09
I was a CTT from 1967 through 1970, and was stationed at Corry Field, Pensacola, Florida, NSGA Bremerhaven, West Germany, and San Miguel NSGA Philippines. I learned Morse Code at age 14 for Boy Scout Camporee competitions. My FCC Amateur Radio callsign is WA8LVY. Being a CTT was very strenuous work. We worked EVE, EVE, DAY, DAY, MID, MID watches in Bremerhaven and in the Philippines. Those around-the-clock work hours in 6 days take a toll on the brain. It was one of the reasons I decided not to ship over. There were the positives of being able to travel all over Europe on days off and the San Miguel base was a tropical paradise. Going to Corregidor Island with Special Services in 1970 was very cool, except our bus being attacked in Manila on the way back to San Miguel.
LikeLike
6 October 2022 at 21:32
I loved 2-2-2-80. The hours per month equate to a 40 hour work week. You get 80 hours to do whatever you want. I don’t know if I could do the sleep schedule today but back then I loved it.
LikeLike
9 October 2022 at 15:08
I was a CTT from 1962-66…had 2-2-80 watches at 2 great duty stations..1st Edzell then 2 years at Sidi Yahia…as a young single guy I found it perfect…those 80 hours off were a gift from heaven…
LikeLike