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Sealift is a term used predominantly in
military logistics Military logistics is the discipline of planning and carrying out the movement, supply, and maintenance of military forces. In its most comprehensive sense, it is those aspects or military operations that deal with: * Design, development, acqui ...
and refers to the use of
cargo ship A cargo ship or freighter is a merchant ship that carries cargo, goods, and materials from one port to another. Thousands of cargo carriers ply the world's seas and oceans each year, handling the bulk of international trade. Cargo ships are usu ...
s for the deployment of military assets, such as weaponry, vehicles, military personnel, and supplies. It complements other means of transport, such as
strategic airlift An airlift is the organized delivery of supplies or personnel primarily via military transport aircraft. Airlifting consists of two distinct types: strategic and tactical. Typically, strategic airlifting involves moving material long distance ...
s, in order to enhance a
state State may refer to: Arts, entertainment, and media Literature * ''State Magazine'', a monthly magazine published by the U.S. Department of State * ''The State'' (newspaper), a daily newspaper in Columbia, South Carolina, United States * ''Our S ...
's ability to
project power ''Project Power'' is a 2020 American science fiction action film directed by Henry Joost and Ariel Schulman, produced by Eric Newman and Bryan Unkeless, and written by Mattson Tomlin. It stars Jamie Foxx, Joseph Gordon-Levitt, and Dominique Fis ...
. Sealift shipping falls into three broad categories: dry cargo freighters, liquid
tankers Tanker may refer to: Transportation * Tanker, a tank crewman (US) * Tanker (ship), a ship designed to carry bulk liquids ** Chemical tanker, a type of tanker designed to transport chemicals in bulk ** Oil tanker, also known as a petroleum tank ...
, and
passenger A passenger (also abbreviated as pax) is a person who travels in a vehicle, but does not bear any responsibility for the tasks required for that vehicle to arrive at its destination or otherwise operate the vehicle, and is not a steward. The ...
or
troop ship A troopship (also troop ship or troop transport or trooper) is a ship used to carry soldiers, either in peacetime or wartime. Troopships were often drafted from commercial shipping fleets, and were unable land troops directly on shore, typicall ...
s. During joint operations, dry cargo ships may transport equipment and supplies required to conduct and sustain the
operation Operation or Operations may refer to: Arts, entertainment and media * ''Operation'' (game), a battery-operated board game that challenges dexterity * Operation (music), a term used in musical set theory * ''Operations'' (magazine), Multi-Ma ...
; tankers carry fuel; while passenger and troop ships carry personnel to the
theater Theatre or theater is a collaborative form of performing art that uses live performers, usually actor, actors or actresses, to present the experience of a real or imagined event before a live audience in a specific place, often a stage. The p ...
and allow the evacuation of
noncombatant Non-combatant is a term of art in the law of war and international humanitarian law to refer to civilians who are not taking a direct part in hostilities; persons, such as combat medics and military chaplains, who are members of the belligerent a ...
s or those in need of
medical aid Health insurance or medical insurance (also known as medical aid in South Africa) is a type of insurance that covers the whole or a part of the risk of a person incurring medical expenses. As with other types of insurance, risk is shared among ma ...
. Sealift can also be divided into strategic and
tactical Tactic(s) or Tactical may refer to: * Tactic (method), a conceptual action implemented as one or more specific tasks ** Military tactics, the disposition and maneuver of units on a particular sea or battlefield ** Chess tactics ** Political tacti ...
sealift. Strategic sealift is the transportation of vehicles and equipment to a staging area equipped with
port A port is a maritime facility comprising one or more wharves or loading areas, where ships load and discharge cargo and passengers. Although usually situated on a sea coast or estuary, ports can also be found far inland, such as Ham ...
facilities, with personnel arriving by other methods. Tactical sealift occurs when a ship is carrying personnel along with vehicles and equipment, and is able to deploy them directly and operationally, like in an
amphibious assault Amphibious warfare is a type of offensive military operation that today uses naval ships to project ground and air power onto a hostile or potentially hostile shore at a designated landing beach. Through history the operations were conducted ...
. While ships are slower than their airborne counterparts and may require port facilities to unload their cargo, their larger capacity allows them to transport heavy
armoured forces Armoured warfare or armored warfare (mechanized forces, armoured forces or armored forces) (American English; see spelling differences), is the use of armored fighting vehicles in modern warfare. It is a major component of modern methods of ...
or bulky supplies that only the largest strategic airlifters (such as the
C-5 Galaxy The Lockheed C-5 Galaxy is a large military transport aircraft designed and built by Lockheed, and now maintained and upgraded by its successor, Lockheed Martin. It provides the United States Air Force (USAF) with a heavy intercontinental-ran ...
) could normally handle, and in much greater quantities. A state's sealift capabilities may include civilian-operated ships that normally operate by contract, but which can be chartered or commandeered during times of military necessity to supplement government-owned naval fleets. Some smaller navies have built multi-role vessels that combine sealift with other capabilities, such as those of a patrol frigate or a command-and-control vessel, the
Royal Danish Navy The Royal Danish Navy ( da, Søværnet) is the Naval warfare, sea-based branch of the Danish Defence force. The RDN is mainly responsible for maritime defence and maintaining the sovereignty of Denmark, Danish territorial waters (incl. Faroe Isla ...
's and the
Royal New Zealand Navy The Royal New Zealand Navy (RNZN; mi, Te Taua Moana o Aotearoa, , Sea Warriors of New Zealand) is the maritime arm of the New Zealand Defence Force. The fleet currently consists of nine ships. The Navy had its origins in the Naval Defence Act ...
's multi-role vessel being examples.


Civilian use

Sealift refers to the re-supply of isolated communities with fuel, building materials, foodstuffs, vehicles and other goods. This is the most common method used for the coastal communities of
northern Canada Northern Canada, colloquially the North or the Territories, is the vast northernmost region of Canada variously defined by geography and politics. Politically, the term refers to the three Provinces_and_territories_of_Canada#Territories, territor ...
due to the lower cost and the larger capacity of ships and barges over aircraft. An annual occurrence in the Arctic, the sealift is usually performed between July and October, when the sea is ice free. Typically two types of ships are used, the older, less-seen cargo ship and the more usual
tugboat A tugboat or tug is a marine vessel that manoeuvres other vessels by pushing or pulling them, with direct contact or a tow line. These boats typically tug ships in circumstances where they cannot or should not move under their own power, su ...
. While both types also haul
barge Barge nowadays generally refers to a flat-bottomed inland waterway vessel which does not have its own means of mechanical propulsion. The first modern barges were pulled by tugs, but nowadays most are pushed by pusher boats, or other vessels ...
s, the cargo ship also carries cargo on deck. Most Arctic communities do not have a port and cranes to unload the supplies but may have a simple dock. Where the community does not have a dock, the ship either must ground itself or the barges. Supplies are then removed by
forklift truck A forklift (also called lift truck, jitney, hi-lo, fork truck, fork hoist, and forklift truck) is a powered industrial truck used to lift and move materials over short distances. The forklift was developed in the early 20th century by various c ...
which is also carried on board. The interior of the barges are used to carry fuel and other supplies are carried in
containers A container is any receptacle or enclosure for holding a product used in storage, packaging, and transportation, including shipping. Things kept inside of a container are protected on several sides by being inside of its structure. The term ...
on deck.


See also

* Power projection *
United States Navy The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage ...
Military Sealift Command *
Royal Navy The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by English and Scottish kings from the early medieval period, the first major maritime engagements were fought in the Hundred Years' War against F ...
's
Royal Fleet Auxiliary The Royal Fleet Auxiliary (RFA) is a naval auxiliary fleet owned by the UK's Ministry of Defence. It provides logistical and operational support to the Royal Navy and Royal Marines. The RFA ensures the Royal Navy is supplied and supported by ...
*
Littoral warfare In military and naval warfare, littoral warfare is operations in and around the littoral zone, within a certain distance of shore, including surveillance, mine-clearing and support for landing operations and other types of combat shifting from ...
*
Loss of Strength Gradient The Loss of Strength Gradient (LSG) is a military concept devised by Kenneth E. Boulding in his 1962 book ''Conflict and Defense: A General Theory''. He argued that the amount of a nation's military power that could be brought to bear in any part ...
*
Seabasing Seabasing is a naval capability to conduct selected functions and tasks at sea without reliance on infrastructure ashore. Seabasing can sustain large military forces during operations at large distances from traditional logistics centers. See also ...
*
Over-the-beach capability A primary measure of a nation's power projection is its over-the-beach capability. This consists of the number of soldiers, tanks, vehicles, and helicopters that a nation can stage over an adversary's defended coast in a time of war. Generally, t ...
*
U.S. Merchant Marine Academy The United States Merchant Marine Academy (USMMA or Kings Point) is a United States service academy in Kings Point, New York. It trains its midshipmen (as students at the academy are called) to serve as officers in the United States Merchant ...


References

{{reflist * ''This article incorporates
public domain The public domain (PD) consists of all the creative work A creative work is a manifestation of creative effort including fine artwork (sculpture, paintings, drawing, sketching, performance art), dance, writing (literature), filmmaking, ...
text from the
United States Department of Defense The United States Department of Defense (DoD, USDOD or DOD) is an executive branch department of the federal government charged with coordinating and supervising all agencies and functions of the government directly related to national secu ...
br>Joint Publication 4-01.2 Sealift Support to Joint Operations
(
pdf Portable Document Format (PDF), standardized as ISO 32000, is a file format developed by Adobe in 1992 to present documents, including text formatting and images, in a manner independent of application software, hardware, and operating systems. ...
document)
Sealift
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Federation of American Scientists The Federation of American Scientists (FAS) is an American nonprofit global policy think tank with the stated intent of using science and scientific analysis to attempt to make the world more secure. FAS was founded in 1946 by scientists who wo ...
Military Analysis Network
Sealift Co-ordination Centre - NATO/EU sealift co-ordination

Government of Nunavut - sealift information
Military strategy Navies Maritime transport