The EADS HC-144 Ocean Sentry is a medium-range, twin-engined turboprop aircraft used by the United States Coast Guard in the search-and-rescue and maritime patrol missions.

Intended to replace the Dassault HU-25 Guardian jet,[2] 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.

EADS responded by stating that the HC-144 is half as expensive to maintain and operate compared to the C-27J in terms of direct maintenance and fuel costs, calling into question the idea as a cost-saving measure.

[1] On 22 September 2017, a ceremony was held in Mobile, Alabama where Airbus and the Coast Guard celebrated the crafts' 100,000th hour of operation in service.

The Coast Guard is upgrading its 18 HC-144As to HC-144Bs intending to improve mission effectiveness and situational awareness through the Ocean Sentry Refresh project.