Saab offers former civilian-owned 340 airframes, upgraded with sensors, mission systems and communications suites, as a maritime surveillance aircraft.

Three Q300s were modified as MPAs by Canada’s Provincial Aerospace for the Swedish Coast Guard.

Береговая охрана США закупила 36 CN-235-300 в варианте HC-144A Ocean Sentry.
The US Coast Guard operates 18 CN235 maritime patrol aircraft referred to under the US military designation system as the HC-144A Ocean Sentry.

Maritime patrol versions of the CN235 and C295 are both equipped with Fully Integrated Tactical System workstations.

Boeing’s Maritime Surveillance Aircraft prototype is Challenger CL600 N614BA (s/n 5614).

Portuguese Air Force C295 Persuader 16702, one of five in service with Escuadron 502 'Elefantes' based at BA6 Montijo.

A computer-generated image of a Turkish Coast Guard ATR 72ASW. The first aircraft is expected to be delivered in 2017.