The Lockheed P-3 Orion is a four-engine turboprop anti-submarine and maritime surveillance aircraft. The P-3M Orion in use with the Spanish Air Force were modified by EADS-CASA from five former Royal Norwegian Air Force P-3B aircraft. They were updated with a new sensor suite and new sensors including: an Elta-2022 radar, SPAS-16 acoustic processor, new 99-channel sonobuoy receiver and AMES-C ESM system.
FAIRCHILD SW3 MERLIN
The Swearingen Merlin or the Fairchild Aerospace Merlin is a pressurised, twin turboprop business aircraft which has been used as a military plane for maritime patrol, reconnaissance, anti-surface warfare and anti-submarine warfare. There are currently two planes of this type in charge.