The EADS CASA HC-144 Ocean Sentry is a medium-ranged, twin-engined aircraft used by the United States Coast Guard in the search-and-rescue and maritime patrol missions. Also known as the Medium Range Surveillance Aircraft, the HC-144 is manufactured by EADS CASA (now Airbus Military), and is based on the company's CN-235 transport.
Intended to replace the Dassault HU-25 Guardian jet,the HC-144A Ocean Sentry is part of the Coast Guard's Integrated Deepwater System Program of recapitalization and new-asset acquisition. Based on the CN-235-300 MP Persuader, the maritime patrol version of the CN-235 military transport, the HC-144 offers a longer endurance than the HU-25 it is replacing in U.S. Coast Guard service, as well as better performance in the low-level observation role.
The HC-144A utilises the Mission System Pallet concept for its electronic systems. This comprises a roll-on, roll-off electronics suite, manufactured by Lockheed Martin, that connects to the aircraft's systems upon installation. The HC-144A's equipment is similar to that installed on the Coast Guard's HC-130 aircraft, reducing maintenance and training costs.