CTO SeaDogs

Significant Changes in the Navy Ratings structure 1998 - 2004
DS - Data Systems Technician
Disestablished on 01 Oct 1998.
Merged into the ET - Electronics Technician (Surface) or the
FC - Fire Controlman ratings (individual preference).
DP - Data Processing Technician
Disestablished on 01 Oct 1998
Merged into the RM - Radioman rating.
IT - Information Systems Technician
Established 04 Nov 1999
RM - Radioman
Disestablished 04 Nov 1999
Rating name changed from RM to IT.
AMS - Aviation Structural Mechanic (Structural)
Disestablished 01 Mar 2001.
AMH - Aviation Structural Mechanic (Hydraulic)
Disestablished 01 Mar 2001.
Merged into the AM - Aviation Structural Mechanic rating.
AK - Aviation Storekeeper
Disestablished 01 Jan 2003.
Merged into the SK - Storekeeper rating (30 Jun 2000 thru 01 Jan 2003).
EW - Electronic Warfare Technician
Disestablished 01 Oct 2003.
Merged into the CTT - Cryptologic Technician (Technical) rating.
CS - Culinary Specialist
Established 04 Jan 2004
MS - Mess Management Specialist
Disestablished 04 Jan 2004
Rating name changed from MS to CS
This rating, prior to being MS's, was the Commisaryman (CS) rating..
CTN - Cryptologic Technician (Networks)
Established in Feb 2004.
Source ratings: CTA, CTI, CTM, CTO, CTR & CTT ratings.
SM - Signalman
Disestablished 30 Sep 2004.
Merged into the QM - Quartermaster rating.