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Defense Primer: Naval Forces

Naval FOrces Refers to Both the Navy                    (U
and   Marine Corps                                        co
Although the term navalforces is often used to refer
specifically to Navy forces, it more properly refers to both  T
Navy  and Marine Corps forces, because both the Navy and  w
Marine Corps are naval services. For further discussion, see  w
CRS  In Focus IF10484, Defense Primer: Department of the  in
Navy, by Ronald O'Rourke. For a discussion of the Marine  gr
Corps that focuses on its organization as a ground-combat
force, see CRS In Focus IF10571, Defense Primer:
Organization of U.S. Ground Forces, by Barbara Salazar    T
Torreon and Andrew  Feickert.                             m

U.S.   Strategy and Nava         Forces                   of
U.S. naval forces give the United States the ability to   co
convert the world's oceans-a global commons that covers   ca
more than two-thirds of the planet's surface-into a
medium  of maneuver and operations for projecting U.S.    T
power ashore and otherwise defending U.S. interests around fo
the world. The ability to use the world's oceans in this  w
manner-and   to deny other countries the use of the world's n
oceans for taking actions against U.S. interests-constitutes  co
an immense  asymmetric advantage for the United States.   be

As discussed elsewhere (see CRS In Focus IF10485,      w
Defense Primer: Geography, Strategy, and U.S. Force    T
Design, by Ronald O'Rourke), the size and composition of  da
U.S. naval forces reflect the position of the United States as  pr
a Western Hemisphere power with a goal of preventing the  re
emergence of regional hegemons (and otherwise defending   Si
and promoting U.S. interests) in Eurasia. As a result, the co
U.S. Navy includes significant numbers of aircraft carriers,  ol
nuclear-powered attack submarines, large surface       h
combatants, large amphibious ships, and underway       to
replenishment ships.                                      pr

Navy Ship Types
The Navy's ballistic missile submarines (SSBNs) are
dedicated to performing a singular mission of strategic
nuclear deterrence. The Navy's other ships, which are  T
sometimes referred to as the Navy's general-purpose ships, co
are generally multimission ships capable of performing a  in
variety of missions other than strategic nuclear deterrence.  (F
The principal types of general-purpose ships in the Navy  of
include attack submarines (SSNs); aircraft carriers
(CVNs);  large surface combatants, meaning cruisers       to
(CGs) and destroyers (DDGs); small surface combatants,
meaning frigates (FFGs), Littoral Combat Ships (LCSs),    In
mine warfare (MIW)  ships, and patrol craft (PCs);        th
amphibious  ships, whose primary function is to transport of
Marines and their equipment and supplies to distant    U.
operating areas and support Marine ship-to-shore
movements  and Marine operations ashore; combat logistics D
force (CLF) ships, which perform underway replenishment   a


Updated November  20, 2024


UNREP) operations,  meaning the at-sea resupply of
  mbat ships; and other support ships of various types.

  he Navy's aircraft carriers embark multimission carrier air
  ings (CVWs) consisting of 60+ aircraft-mostly fixed-
  ing aircraft, plus a few helicopters. Each CVW typically
  cludes 40 or more strike fighters that are capable of air-to-
  ound (strike) and air-to-air (fighter) combat operations.

  ZE  of  the  Navy
  he total number of ships in the Navy is a one-dimensional
  etric that leaves out many other important factors bearing
on the Navy's size and capabilities. Even so, observers
  ten cite the total number of ships in the U.S. Navy as a
  nvenient way of summarizing the Navy's size and
  pabilities.

  he quoted number of ships in the Navy reflects the battle
  rce ships counting method, which is a set of rules for
  hich ships count (or do not count) toward the quoted
  umber of ships in the Navy. The battle force ships
  unting method was established in the early 1980s and has
  en modified by subsequent legislation. Essentially, it
includes ships that are readily deployable overseas, and
  hich contribute to the Navy's overseas combat capability.
  he Naval History and Heritage Command maintains a
  tabase on numbers of ships in the Navy from 1886 to the
  esent. (It is available here: https://www.history.navy.mil/
  search/histories/ship-histories/us-ship-force-levels.html.)
  nce this database extends back to 1886, it uses a different
  unting method that is more suitable for working with
  lder historical data. This alternate counting method,
  owever, produces, for the 1980s onwards, figures for the
  tal size of the Navy that are different than the figures
  oduced by the battle force ships counting method. For this
reason, using figures from the NHHC database to quote the
  rrent size of the Navy can cause confusion.

  lavy  Force-Level Goal
  he Navy determines its force-level goal-the size and
  mposition of the fleet it would like to reach and maintain
  coming  years-through a Force Structure Analysis
  SA). FSAs are conducted every few years. For each type
  ship, the FSA calculates the number required for
  arfighting, and the number required for maintaining day-
  -day forward-deployed presence overseas.

  December  2016, the Navy released a force-structure goal
  at calls for achieving and maintaining a fleet of 355 ships
  certain types and numbers. The 355-ship goal was made
  S. policy by Section 1025 of the FY2018 National
  efense Authorization Act (H.R. 2810/P.L. 115-91 of
  ecember 12, 2017). The provision, which was codified as
  note to 10 U.S.C. 8661, has no enforcement mechanism.
The 355-ship goal predates the Trump and Biden

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