Editing Ship (section)

===Naval vessels===
[[File:USS Harry S. Truman alongside USNS John Lenthall.jpg|thumb|American [[aircraft carrier]] {{USS|Harry S. Truman}} and a [[replenishment ship]]]]
[[Naval ship]]s are diverse in [[List of types of naval vessels|types of vessel]]. They include: [[List of naval ship classes in service|surface warships]], [[List of submarine classes in service|submarines]], and [[auxiliary ship]]s.

Modern warships are generally divided into seven main categories: [[aircraft carrier]]s, [[cruiser]]s, [[destroyer]]s, [[frigate]]s, [[corvette]]s, [[submarine]]s and [[amphibious warfare ship]]s. The distinctions among cruisers, destroyers, frigates, and corvettes are not codified; the same vessel may be described differently in different navies. [[Battleship]]s were used during the [[Second World War]] and occasionally since then (the last battleships were removed from the [[U.S. Naval Vessel Register]] in March 2006), but were made obsolete by the use of [[carrier-borne aircraft]] and [[guided missile]]s.<ref>With the addition of corvettes, this is the categorization used at {{cite web |url=http://www.navy.mil/navydata/our_ships.asp |title=U.S. Navy Ships |access-date=2008-04-20 |author=United States Navy |author-link=United States Navy |publisher=United States Navy |archive-date=2008-04-10 |archive-url=https://web.archive.org/web/20080410002444/http://www.navy.mil/navydata/our_ships.asp |url-status=dead }}</ref>

Most military submarines are either [[attack submarine]]s or [[ballistic missile submarine]]s. Until the end of [[World War II]] the primary role of the diesel/electric submarine was anti-ship warfare, inserting and removing covert agents and military forces, and intelligence-gathering. With the development of the [[homing torpedo]], better [[sonar]] systems, and [[Nuclear navy|nuclear propulsion]], submarines also became able to effectively hunt each other. The development of [[Submarine-launched ballistic missile|submarine-launched nuclear]] and [[cruise missiles]] gave submarines a substantial and long-ranged ability to attack both land and sea targets with a variety of weapons ranging from [[cluster munition]]s to [[nuclear weapon]]s.

Most [[Navy|navies]] also include many types of support and auxiliary vessel, such as [[minesweeper (ship)|minesweepers]], [[patrol boat]]s, [[OPV (naval)|offshore patrol vessels]], [[replenishment ship]]s, and [[hospital ship]]s which are designated [[healthcare|medical treatment]] facilities.<ref>[http://wordnet.princeton.edu/perl/webwn?s=hospital%20ship Hospital Ship]{{dead link|date=June 2017 |bot=InternetArchiveBot |fix-attempted=yes}} (definition via [[WordNet]], [[Princeton University]])</ref>

Fast combat vessels such as cruisers and destroyers usually have fine hulls to maximize speed and maneuverability.<ref>Cutler, 1999, p. 224.</ref>  They also usually have advanced [[marine electronics]] and communication systems, as well as weapons.