2024海岸警卫队极地安全巡逻艇的成本(英).pdf
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1、Notes:Unless this report indicates otherwise,all years referred to are federal fiscal years,which run from October1 to September30 and are designated by the calendar year in which they end,and all costs are expressed in 2024dollars.All tonnage numbers are expressed as long tonsor 2,240poundswhich ar
2、e also known as imperial tons or displacement tons.Numbers in the text may not add up to totals because of rounding.AUGUST|2024On April23,2019,the Coast Guard awarded a contract to VT Halter Marine to build the first of a class of new heavy polar icebreakers,called the Polar Security Cutter(PSC).The
3、 service plans to name the first ship the Polar Sentinel.On December29,2021,the Coast Guard exercised an option under that contract to have Halter Marine build the second ship of the class.Halter Marine was subsequently purchased by Bollinger Shipyards in November2022 and renamed Bollinger Mississip
4、pi Shipbuilding.Construction of the lead ship in the PSC program has been plagued by delays and cost overruns.In February2024,the Coast Guard notified the Congress that the ship would experience cost growth in excess of 20percent and a schedule delay in excess of one year.Despite a contract awarded
5、five years ago,full construc-tion of the lead ship has not begun,although the service is aiming to start by the end of calendar year 2024.The Congressional Budget Office was asked by the House Homeland Security Committee to provide inde-pendent estimates of the costs of the PSC programnot only for t
6、he three-ship program of record(that is,the officially approved program)but also for larger programs including as many as nine ships.This report describes those estimates.Using its own weight-based cost model,CBO estimates that the first PSC would cost$1.9billion in 2024dollars.Subsequent ships woul
7、d average about$1.6billion each.Given those estimates,the three-ship PSC program would cost$5.1billionabout 60percent more than the Coast Guards current estimate.1 The Coast Guards current official estimate of the cost of acquiring three PSCs is$3.2billion,but the service is in the process of develo
8、ping a new estimate,which it expects to release later in 2024.CBO estimates that operating and supporting a force of three PSCs would cost$12.4billion between 2029 and 2063,when those ships would be in service.If the Coast Guard acquires more than three ships,operating costs would be higher and woul
9、d continue for a longer period.The Polar Security Cutter ProgramThe Homeland Security Act of 2002created the Department of Homeland Security and transferred the Coast Guard from the Department of Transportation to the new department.The law listed 11specific missions that the service must be prepare
10、d to perform.2 The Coast Guards polar icebreakers support 9 of those 11missions in the worlds polar regions:marine safety;search and rescue;aids to navigation;fisheries law enforcement;marine environmental protection;ice operations;polic-ing ports and waterways and conducting coastal security;1.CBO
11、testified on these analytical results on May7,2024.See testimony of Eric J.Labs,Senior Analyst for Naval Forces and Weapons,before the Subcommittee on Transportation and Maritime Security,Committee on Homeland Security,U.S.House of Representatives,The Cost of the Coast Guards Polar Security Cutter(A
12、pril30,2024),www.cbo.gov/publication/60168.2.Sec.888 of the Homeland Security Act of 2002,Public Law107-296,116Stat.2135,2249,https:/ Cost of the Coast Guards Polar Security Cutter2THE COST OF THE COAST GUARDS POLAR SECURITY CUTTER AUGUST 2024defense readiness;and other law enforcement.3 The ice-bre
13、akers do not support the missions of drug interdiction or migrant interdiction.4 The Coast Guard is developing programs to replace its existing polar icebreakers over the next two decades as well as to increase their number.The Coast Guards Existing Polar IcebreakersThe Coast Guard currently operate
14、s two polar icebreak-ers:the Polar Star,a heavy icebreaker,and the Healy,a medium icebreaker.A heavy icebreaker is defined not by its weight or by the amount of water it displaces but by the amount of ice it can break while under-way.The Coast Guards heavy icebreakers can break through 6feet of ice
15、continuously at a speed of 3knots and can break through 20or more feet of ice by back-ing up and ramming.Medium icebreakers can break through 4.5feet of ice at 3knots and 8feet or more by backing up and ramming.Polar icebreakers generally cut a path through ice-covered water by pushing the bow up on
16、to the ice,where the weight of the ship breaks the ice into pieces.In mod-ern icebreakers,the shape of the hull typically folds the broken ice under the adjacent solid ice as the ship passes,leaving a clean channel in its wake.Three characteristics of icebreakers allow them to perform that task:powe
17、rful engines,a strongly reinforced hull,and a sloping bow.Together,those features make icebreakers relatively short,wide,and very heavy.The Polar Star was built in the 1970s and displaces 13,200tons of water when fully loaded(that is,when carrying crew,stores,cargo,ammunition,fuel,and other liquids)
18、.Commissioned in 1976,the Polar Star is 48years old18years beyond its designed service life.The Healy,which entered service in 2000,displaces 16,000tons when fully loaded.Although the Healy is longer and heavier than the Polar Star,it is a medium icebreaker because its engines are less powerful,with
19、 half the shaft horsepower of the heavy icebreaker and,thus,less icebreaking capability.(Shaft horsepower is 3.The terms heavy icebreaker and medium icebreaker in this report refer to polar icebreakers.The Coast Guard operates a heavy icebreaker,called the Mackinaw,on the Great Lakes,but that ship i
20、s much smaller and has much less icebreaking capability than the services polar icebreakers.For more information on the Coast Guards current and future icebreaker programs,see Ronald ORourke,Coast Guard Polar Security Cutter(Polar Icebreaker)Program:Background and Issues for Congress,Report for Cong
21、ress RL34391,version 264(Congressional Research Service,updated July15,2024),https:/ amount of power delivered by a ships engines to its propeller or turbine shaft.)Although its designed service life ends in 2030,the Healy was forced to return to port in August2024because of an electrical fire,and t
22、he Coast Guard is uncertain when or if the ship will be able to resume normal operations.As a result,the service may have no icebreaker presence in the Arctic this summer.5 Plans for Replacing the Existing Polar IcebreakersIn 2013,the Coast Guard proposed a plan to replace its two operational ships
23、with six new polar icebreakers:three heavy icebreakers and three medium icebreakers.The Coast Guards most recent analysis of its goals for the mix of ships in its fleet(announced in April2023)calls for increasing the number of new polar icebreakers to a total of eight or nine:four or five heavy iceb
24、reakers and four or five medium icebreakers.6 The Coast Guard believes that the year-round presence of one icebreaker in the East Arctic and another in the West Arctic,as well as the half-time presence of an icebreaker in the Antarctic,is necessary.The increase in the number of polar icebreakers des
25、ired by the Coast Guard in the Arctic is driven by increased commercial activity and economic and geopolitical competition in that region.The services desire for an icebreaker in the Antarctic stems primarily from the continuing need to resupply McMurdo Station,a U.S.research facility on the contine
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- 2024 海岸 警卫队 极地 安全 巡逻艇 成本
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