Click on the acronym for a general "fact file" on statistics and lists of active duty Navy ships. The links under the ship names direct to either a particular ship or a picture of one, both for the same purpose; to see what they look like.
CVN: Nuclear Powered Aircraft Carriers
CG: Cruisers
DDG: Guided Missile Destroyers
SSN: Attack Submarines
SSBN: Fleet Ballistic Missile Submarines
SSGN: Guided Missile Submarines
FFG: Frigates
LHA/LHD: Amphibious Assault Ships
LCC: Amphibious Command Ships
LPD: Amphibious Transport Docks (Austin Class); San Antonio Class
LSD: Dock Landing Ships (W. Island Class); Harper's Ferry Class
LCAC: Landing Craft, Air Cushioned
LCM, LCU: Landing Craft, Mechanized & Utility
FSF: Fast Sea Frame
JHSV: Joint High Speed Vessel
LCS: Littoral Combat Ships
MCM: Mine Countermeasures Ships
PC: Patrol Coastal Ships
RHIB: Rigid Hull Inflatable Boats
AS: Submarine Tenders
YP: Yard Patrol Craft
Mark V: Special Operations Craft
AGF: Command Ships; Old Ironsides