Istanbul, Turkey – Amid an ongoing rift between the US and Turkey over its decision to buy a sophisticated Russian air defence system, Ankara says it is determined to complete the $3.5bn acquisition and activate the S-400s in October.
But Turkey is also leaving the door open to purchase advanced Patriot missiles from the United States, saying negotiations are still under way on cost, technology transfers, and the delivery period, defence officials said on Wednesday.
NATO-member Turkey has long relied on US Patriot batteries from the alliance for its air defence, but has been looking to procure its own system for years.
NATO nations – particularly the US – view Turkey’s purchase of the Russian-made equipment with suspicion, as it is believed to be incompatible with systems relied upon by the alliance.
The US stance was recently underlined by Vice President Mike Pence in a speech at the Munich Security Conference.
“We will not stand idly by while NATO allies purchase weapons from our adversaries. We cannot ensure the defence of the West if our allies grow dependent on the East,” said Pence.
Turkey says it needs alternative defences to counter regional threats and can nationalise the Russian system by re-designing its software.
Turkish officials have accused the US of politicising the purchase after divisions have emerged, particularly over the civil war in Syria and Washington’s support for the Kurdish YPG militia in the fight against Islamic State of Iraq and the Levant (ISIL, ISIS).
Turkey considers the YPG – the US’ armed and trained main ally in Syria – to be a “terrorist group”.
Murat Aslan, a Turkish defence analyst and former military officer, noted the defence arsenals of Baltic and East European states are made up of Russian systems as well as NATO ones, including radar and support mechanisms. As such, he questioned the US’ objections to Turkey’s S-400 purchase.
“Why not? Turkey had started to procure the US air defence system but it was the US side that demanded a very high price, conditionality, and there were concerns over the probable veto by the [US] Congress,” he told Al Jazeera.
Aslan suggested concerns over “interoperability” between the Western and Eastern defence systems were unfounded.
India signs S-400 deal with Russia sidestepping US opposition
“The deal with the Russian government does not ban any further patch of software that Turkey can modify, in accordance with national and NATO standards.
“It is a vital issue not only for NATO, but also for Turkish aviation assets. Hence re-designing the software of the system will completely make S-400 interoperable with the NATO systems,” he said.
Some defence engineers say Turkey can re-design software only for parts that Russia grants access to, and building entirely “indigenous” software to control the S-400s is impossible.
The issue remains highly political and Turkish military and technology officials refused to comment when asked by Al Jazeera.
A senior US official, speaking to Al Jazeera on condition of anonymity, said US Congress would not approve a Patriot sales package to Turkey unless it drops the S-400 deal with Russia, but both sides have been working on alternative solutions.
Asked about Greece – another NATO member that purchased Russia’s S-300 system in mid-1990s, the American official said as an alliance there was a different view of Russia at that time.
“It had not invaded and seized sovereign territory of its neighbours [at that time],” he said, citing Moscow’s later military action in Georgia and Ukraine.
“We also didn’t have an F-35 [fighter jet] programme under way at the time where the operation of an S-300 system would necessarily call its security into question.”
Aslan said US hegemony in the defence industry is on the decline and Russian air defence systems are more qualified.
“The ultimate purpose of the United States is to have any country, now Turkey, be dependent on US military assets to define what to do or not to do,” he said.