The United States military has numerous types of watercraft, operated by the Navy, including Naval Special Warfare Command and Military Sealift Command, as well as the Coast Guard, Army and Air Force

Commissioned ships (USN)

Aircraft carriers

• Nimitz class – 10 active
• Gerald R. Ford class – 1 active

Amphibious assault ships

• Wasp class – 7 active
• America class – 2 active

Amphibious command ships

• Blue Ridge class – 2 active

Amphibious transport docks

• San Antonio class – 12 active

Attack submarines

• Los Angeles class – 24 active
• Seawolf class – 3 active
• Virginia class – 22 active

Ballistic missile submarines

• Ohio class – 14 active

Classic frigate

• USS Constitution – oldest commissioned ship in USN, an 'Original Six' frigate, circa. 1797. Not counted as part of the deployed combat fleet.

Cruisers

• Ticonderoga class – 13 active

Destroyers

• Arleigh Burke class – 73 active
• Zumwalt class – 2 active

Dock landing ships

• Whidbey Island class – 6 active
• Harpers Ferry class – 4 active

Expeditionary mobile base

(sub-variant of the expeditionary transfer dock)

• Montford Point class
  • USS Lewis B. Puller (ESB-3)
  • USS Hershel "Woody" Williams

Guided missile submarines

• Ohio class – 4 active

Littoral combat ships

• Freedom class – 8 active
• Independence class – 15 active

Mine countermeasures ships

• Avenger class – 8 active

Submarine tenders

• Emory S. Land class – 2 active

Technical research ship

• USS Pueblo (AGER-2) – currently^[when?] held captive by North Korea. Still in commission, but not counted as part of the deployed combat fleet.

Non-commissioned ships (MSC)

(List includes "Support" and "Ready Reserve Force" ships)

Cable repair ships

• Zeus class – 1 active

Cargo and replenishment ships

• Watson-class vehicle cargo ship – 8 active
• Bob Hope-class vehicle cargo ship – 7 active
• Shughart-class vehicle cargo ship – 3 active
• Gordon-class vehicle cargo ship – 2 active
• Supply-class fast combat support ship – 2 active
• Lewis and Clark-class dry cargo ship – 14 active
• Henry J. Kaiser-class replenishment oiler – 15 active

Crane ships

• Gopher State class – 3 active
• Keystone State class – 3 active

Expeditionary transfer dock

• Montford Point class
  • Expeditionary Transfer Dock (ESD) – 2 active
  • Expeditionary Mobile Base (ESB) – 3 active (2 commissioned)

High speed vessels

• Spearhead-class expeditionary fast transport – 9 active

Stand-alone vessels;

• Sea Fighter (FSF-1) – active
• USNS Guam (HST-1) – active
• HST-2 (unnamed) – leased to civilian ferry service^[1][2]

Hospital ships

• Mercy class – 2 active

Landing craft

• Landing Craft Air Cushion – 74 active
• Landing Craft Utility 1610, 1627 and 1646 – 32 active

Salvage ships

• Safeguard class – 2 active

Surveillance, intelligence and survey vessels

• Howard O. Lorenzen-class instrumentation ship – 1 active
• Impeccable-class ocean surveillance ship – 1 active
• Pathfinder-class survey ship – 6 active
• Stalwart-class ocean surveillance ship – 2 active
• Victorious-class ocean surveillance ship – 4 active

Tug boats

• Powhatan-class fleet ocean tug – 4 active
• Natick-class large harbor tug – 8 active
• Valiant-class harbor tug – 6 active

Special Warfare and Coastal Riverine Force (NSW)

Surface craft

• Combat Rubber Raiding Craft
• Small unit riverine craft
• Riverine Command Boat
• Rigid Raider
• Mark V Special Operations Craft
• Special Operations Craft - Riverine (SOC-R)
• Mark VI Patrol Boat
• Coastal Command Boat (CCB)
• Combatant Craft Assault (CCA)^[3]
• Combatant Craft Medium (CCM)^[4][5]
• Combatant Craft Heavy (CCH)^[6][7]

Swimmer delivery vehicles

• Swimmer Delivery Vehicle (Mk 8)
• Surface-Planing Wet Submersible

Cutters (USCG)

Patrol ships

• Legend-class National Security Cutter, Large 8
• USCGC Alex Haley (WMEC-39)
• Famous-class Medium Endurance Cutter 13
• Reliance-class Medium Endurance Cutter 14
• Sentinel-class cutter 38

Patrol boats

• Island-class patrol boat 30
• Marine Protector-class coastal patrol boat 73
• 47-foot Motor Lifeboat 117
• Response boat-medium 48
• USCG Utility Boat 156
• USCG Long Range Interceptor 10
• Defender class Response boat-small 300^[8]
• USCG transportable port security boat
• Over the horizon boat
• Short Range Prosecutor 10

Icebreakers

• Bay-class icebreaking tug 9 active
• Polar class 1 active

Stand-alone vessels;

• USCGC Mackinaw (WLBB-30)
• USCGC Healy (WAGB-20)

Tenders

• USCG seagoing buoy tender
• USCG coastal buoy tender
• USCG inland buoy tender
• USCG inland construction tender

Support craft (US Army)

Logistics support vessel

• General Frank S. Besson-class logistics support vessel – 8

Landing craft

• Runnymede class large landing craft – 35
• Landing Craft Mechanized
  • LCM-8, Mod 1 - 34
  • LCM-8, Mod 2 - 6

Tug boats

• MGen. Nathanael Greene-class tugboat – 6

Support craft (USAF)

Tug boats

• Rising Star tugboat (Thule AFB harbor)

Recovery craft

• 82nd ATRS drone recovery watercraft (x3 120 ft recovery vessels, x2 smaller boats)