Naval tactics and doctrine is the collective name for methods of engaging and defeating an enemy ship or fleet in battle at sea during naval warfare, the naval equivalent of military tactics on land.

Naval tactics are distinct from naval strategy. Naval tactics are concerned with the movements a commander makes in battle, typically in the presence of the enemy. Naval strategy concerns the overall strategy for achieving victory and the large movements by which a commandant or commander secures the advantage of fighting at a place convenient to himself.

Modern naval tactics are based on tactical doctrines developed after World War II, following the obsolescence of the battleship and the development of long-range missiles. Since there has been no major naval conflict since World War II, apart from the Indo-Pakistani Naval War of 1971 and the Falklands War, many of these doctrines reflect scenarios developed for planning purposes. Critics argue that the collapse of the Soviet Union and the subsequent reduction in the size and capabilities of the Russian Navy renders most such fleet-on-fleet scenarios obsolete.

A central concept in Western modern naval fleet warfare is battlespace: a zone around a naval force within which a commander is confident of detecting, tracking, engaging and destroying threats before they pose a danger. As in all forms of warfare, a critical objective is to detect the enemy while avoiding detection.

The open sea provides the most favorable battlespace for a surface fleet. The presence of land and the topography of an area compress the battlespace, limit the opportunities to maneuver, make it easier for an enemy to predict the location of the fleet, and make the detection of enemy forces more difficult. In shallow waters, the detection of submarines and mines is especially problematic.

One scenario that was the focus of American and NATO naval planning during the Cold War was a conflict between two modern and well equipped fleets on the high seas, the clash of the United States/NATO and the Soviet Union/Warsaw Pact. Because the Cold War ended without direct total war between the two sides, the outcome of such an action remains hypothetical, but was broadly understood to include, towards the late Cold War, multiple salvoes of anti-ship missiles against the Americans and U.S. attempts to air strike Soviet land bases and/or fleets. Given the eventual strategic surprise effectiveness of anti-ship missiles, the outcome of such a clash is far from being clear.

The main consideration is for carrier battle group (CVBGs). Critics of current naval doctrine argue that although such a fleet battle is unlikely to occur in the foreseeable future, Cold War thinking continues to dominate naval practice. However, others point toward the increased naval budgets of Russia and South and East Asia as a possibility that conventional naval combat in the future may become relevant again.

Naval tactics and weapons systems can be categorized by the type of opponents they are intended to fight. Anti-air warfare (AAW) involves action against aircraft and incoming missiles. Anti-surface warfare (ASuW) focuses on attacking and defending against surface warships. Anti-submarine warfare (ASW) deals with the detection and destruction of enemy submarines.