As of 2018, there are approximately 77 vessels in the Navy, including minor auxiliary vessels. A breakdown includes; one amphibious assault ship (also used as an aircraft carrier), 2 amphibious transport docks, 11 frigates, 2 submarines, 6 mine countermeasure vessels, 22 patrol vessels and a number of auxiliary ships. The total displacement of the Spanish Navy is approximately 225,000.
Amphibious assault ships are the centerpieces of amphibious warfare and fulfill the same power projection role as aircraft carriers except that their striking force centers on land forces instead of aircraft.
Amphibious transport docks are warships that embark, transport, and land Marines, supplies, and equipment in a supporting role during amphibious warfare missions. With a landing platform, amphibious transport docks also have the capability to serve as secondary aviation support for an expeditionary group.
The Coastal Patrol Ships (PC), are small, fast, and heavily armed. They perform important missions including surveillance, special forces operations, and littoral combat.
The Auxiliary Fleet includes intelligence, oceanographic, school, logistics and transport vessels.
An attack submarine or hunter-killer submarine is a submarine specifically designed for the purpose of attacking and sinking other submarines, surface combatants and merchant vessels.
Combat aircraft, or “Warplanes”, are divided broadly into multi-role, fighters, bombers, attackers, and electronic warfare support.