- Turbine General Electric 19 750 kW
- Engines Navantia 2 * Navantia- MAN 7860 kW
- Siemens 2 * Azimuth thrusters of 11,000 kW
- LANZA-N air search, ARIES surface search, PAR aircraft landing
- EID ICCS integrated communications control system
- REGULUS and RIGEL
- 4 * 20 mm guns
- 2 * BPDMS (FBNW)
- 1 * VLS (FBNW)
- 4 * 12.7 mm machine guns
- AV-8B Harrier II, Chinook, Sea King, NH-90
- Aircraft composition:
- Pure combat: 25 AV-8B/F-35B + 6 flight deck parking spots
- Mix: 11 AV-8B + 12 NH90 + 6 flight deck parking spots
- Pure transport: 25 NH90 + 6 flight deck parking spots
Juan Carlos I (L 61) is a multi-purpose amphibious assault ship-aircraft carrier in the Spanish Navy. Similar in role to many aircraft carriers, the ship has a ski jump for STOVL operations, and is equipped with the AV-8B Harrier II attack aircraft. Is named in honour of Juan Carlos I, the former King of Spain.
The new ship plays an important role in the fleet, as a platform that not only replaces the Newport-class LSTs Hernán Cortés and Pizarro for supporting the mobility of the Marines and the strategic transport of other ground forces, but also acts as a platform for carrier-based aviation replacing the now withdrawn aircraft carrier Príncipe de Asturias.
The ship has a flight deck of 202 metres (663 ft), with a ski-jump ramp. The ship's flight deck has eight landing spots for Harrier, F-35 Lightning II or medium-sized helicopters, four spots for heavy helicopters of the CH-47 Chinook or V-22 Osprey size. The ship can carry either 30 helicopters or 10/12 McDonnell Douglas AV-8B Harrier II or Lockheed Martin F-35 Lightning II and 10/12 helicopters, using the light vehicles bay as an additional storage zone. For the first time in the Spanish Navy, the ship uses diesel-electric propulsion, simultaneously connecting both diesels and the new technology gas turbine powerplant to a pair of azimuthal pods.
The complement of the ship is around 900 naval personnel, with equipment and support elements for 1,200 soldiers. Multi-functional garage and hangar space on two levels covers 6,000 m2 (65,000 sq ft), with capacity for 6,000 tonnes load on each level. A stern well deck measuring 69.3 by 16.8 m (227 by 55 ft) can accommodate four LCM-1E landing craft which can beach-deliver non-swimming ground vehicles like tanks and four RHIBs, or one Landing Craft Air Cushion plus Assault Amphibious Vehicles.
Construction of the 231 m (758 ft), 27,000-tonne ship started in May 2005 simultaneously at the Navantia Shipyards in Ferrol, Galicia (with the cut of the first plate corresponding to Block 320) and in Fene, Galicia (with the cut of the first plate corresponding to Block 330). The ship, that supposes a service load of 3,100,000 hours of production and 775,000 hours of engineering, was launched 10 March 2008, and was commissioned 30 September 2010. The original budget was €360 million but the ship cost €462 million (US$600 million) in the end.