In July 2005, Turkey’s SSM defence procurement authority signed a contract to meet its Meltem III requirement for 10 maritime patrol and anti-submarine warfare (ASW) aircraft. It ordered a dedicated version of the ATR 72-500 regional transport turboprop, called the ATR 72 ASW. Almost 8 years later, Turkey hasn’t taken delivery of any planes. They’ve has had more luck with the Meltem I/II program, which has begun fielding smaller CN-235 MPAs.
In 2013, Turkey finally dealt with its Meltem III contract, and signed a revised agreement. They’ll buy fewer ATR-72s, split that buy between utility and maritime patrol versions, and change the base airframe.