The final parts of the second battery of Russian S-400 missile defense system have arrived in capital Ankara, Turkish Defense Ministry said on Sunday, Anadolu reports.

Noting that the delivery process for the second S-400 battery started on Aug. 27, the ministry said the transfer was completed at Murted Airbase on Sunday.

The delivery of the first battery equipment was made on July 12-25, it added.

Currently, the installation of the system is underway and Turkish military personnel are being trained on the use of the system. The system is projected to get operational in April 2020.

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Early last week Turkey announced the start of a second round of S-400 component deliveries from Russia at a moment Turkish President Erdogan met with Putin in Moscow to hold talks on Syria developments. But it already appears the first batch — delivered in July at Mürted Air Base near Ankara — has gone operational, new satellite images reveal. 

Turkey will receive the second batch of the Russian S-400 missile system on Tuesday, its defence minister Hulusi Akar has said. Ankara received its first supply of S-400 missiles in July, despite warning by the United States about possible sanctions. Acquisition of the highly advanced air defence system has led to a standoff between the Turkey and its NATO allies, especially the US. Deliveries of the system are set to continue until April 2020.

Turkey has been officially “booted” from the F-35 multirole combat aircraft program. The F-35 multirole combat aircraft, produced by US-based arms manufacturer Lockheed Martin, is part of a massive weapons program exceeding $1 trillion. A single aircraft can cost over $100 million, or over twice the cost of Russia’s new Su-57 and many times more expensive than other Russian, Chinese and European-made aircraft already in operation.