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Examples of Vessels in the Armed Forces Subject to UNDS

Army Vessel Classification

Vessel Type Mission
* Lighterage Transport equipment, cargo, and personnel between ships, from ship to shore, or for operational mission support.
* Floating Utility Perform port terminal operations.

Navy Vessel Classification

Vessel Type Mission
* Aircraft Carriers Provide air combat support to the fleet with landing and launch platform for airplanes and helicopters.
* Surface Combatants Provide air defense, missile defense, antisubmarine warfare support, merchant and carrier group protection, independent patrol operations, and tactical support of land-based forces.
* Amphibious Ships Provide a landing and take-off platform for aircraft, primarily helicopters, and a means for launching and recovering smaller landing craft.
* Submarines Provide strategic missile defense, search and rescue, and research and survey capability.
* Auxiliaries Provide logistical support, such as underway replenishment, material support, and rescue and salvage operations.
* Mine Warfare Ships Conduct minesweeping missions to find and destroy mines.
* Small Boats and Service Craft Provide a variety of services. Includes: patrol training craft (YP), tug boats (YTB), torpedo trials craft (YTT), landing craft, barges, transport boats, personnel boats, harbor patrol boats, work boats, utility boats, floating drydocks, and rigid inflatable boats.
* Inactive Assets Vessels in various states of readiness, the majority of which are scheduled for scrapping, transfer to MARAD, or sale to foreign nations.

Air Force Vessel Classification

Vessel Type Mission
* Floating Utility Used for personnel and utility transport, training, and repair operations.

Marine Corps Vessel Classification

Vessel Type Mission
* RRC Perform offensive amphibious operations.
* CRRC Perform offensive amphibious operations.

Military Sealift Command Vessel Classification

Vessel Type Mission
* SMSF Support the Armed Forces in specialized missions such as undersea surveillance, missile range tracking, oceanographic and hydrographic surveys, acoustic research, and submarine escort.
* NFAF Provide underway replenishment services (i.e., deliver fuel, food, spare parts, equipment, and ammunition) to Navy surface combatants, as well as ocean towing and salvage services.

Coast Guard Vessel Classification

Vessel Type Mission
* Cutters Provide multi-mission capability, including patrol, air defense search and rescue, and drug interdiction.
* Tenders Used to maintain inland, river, coastal, and offshore buoys and navigational aids, and to serve as construction platforms.
* Icebreakers Support the winter icebreaking efforts in order to maintain open waterways in the Arctic, Antarctic, and the northern regions of the U.S. including the Great Lakes, Northwest, and Northeast.
* Tugboats Provide towing and support services (icebreaking, search and rescue, and law enforcement) to other vessels.
* Small Boats and Crafts Used in harbors and inland waters for drug interdiction, port security, cable repair, maintenance of navigation aids, patrolling for illegal dumping, search and rescue, etc. In addition, they are used in rough surf for search and rescue, for inland river and lake patrol, as transports, and for fire fighting.
* Other Vessels Sailing cutters and other vessels used for training.