Abbreviations are used by all branches of the United States Military.  They use abbreviations to provide information at a much more rapid pace and to save time when giving orders or describing plans of action.  Below you will find a list of the most used abbreviations relied on by the Navy.   Additionally, many of these abbreviations are used by the United States Navy SEALs.

AWSI avionics-weapons system integration
AAA anti-aircraft artillery
AALC amphibious assault landing craft
BUD/S basic underwater demolition/SEAL
BUNO bureau number (navy acft id number)
CANTRAC catalog of navy training courses
CORS navy command and control system ashore program
DON department of the navy
FANFARE navy torpedo countermeasures sys for ships
MCTCA navy meteorology and calibration program
MOS/NEC military occupational specialty/navy enlisted classification
MPN military personnel-navy (appropriation)
NALC navy ammunition logistics code
NARDAC navy regional data automation ctr
NARM navy resource model
NAVCIPS navy standard civilian pay system
NAVDAF navy data automation facilities
NAVMTO navy material transportation office
NAVTIP navy training improvement program
NCAB navy contract adjustment board
NCCPM navy command & control process model
NEC navy enlisted classification
NOBC navy officer billet classification
NPD navy procurement directive
NRL navy research laboratories
NSD navy support data
NSP navy support plan
NTDS navy tactical data system
NTP navy training plan
SEAL sea, air, and land, elite special operations forces
USN united states navy
USNS united states naval ship (civilian-manned; in service)
USNSU united states navy seals
WPN weapons procurement navy