"This morning we received a memorandum agreed by our US colleagues on the prevention of air incidents in the Syrian Arab Republic," Maj. Gen. Igor Konashenkov told reporters.
"We believe that the signing of such a document is an important step that has practical importance."
The Russian Defense Ministry said Tuesday that the memorandum regulates flights of all aircraft over Syria, including drones.
The agreement between the US and Russia on the flights over Syria shows high potential for cooperation between the two countries, including in the fight against terrorism, Russian Deputy Defense Minister Anatoly Antonov said Tuesday.
According to him, "the document is of great practical importance" since it regulates the activities of manned and unmanned aircraft in the Syrian airspace.
"The memorandum contains a set of rules and regulations that aim to prevent incidents between Russian and US aviation."
However, the signing of the memorandum does not change Russia's "principled stance" concerning the fact that the Russian Aerospace Force acts in Syria in accordance with the international law and at the request of the country's legitimate authority, while the US-led coalition does not, Antonov said.
"The United States and the anti-ISIL coalition led by the country use force on the territory of Syria without a request from its government and without a UN Security Council decision."
Syrian Airspace Overcrowded
According to the Russian defense ministry's spokesman, the presence of different aircraft in Syria has increased recently. There are sometimes over 30 aircraft in one area at the same time that poses threat to the safety of flights over Syria. "These are military transport aircraft, combat aircraft, unmanned vehicles of various sizes, including unmanned fighting aerial vehicles."
He noted that the Russian air group coordinates its activities with the Syrian air traffic control service concerning every flight of Russian aircraft. "The rest of manned and unmanned military aircraft are flying in the Syrian airspace without approval and without transponders turned on."
It is also necessary to establish cooperation with Pentagon on rescuing pilots in Syria, the Russian defense ministry's spokesman said.
#SYRIA Signing of this document is an important step,but it's necessary to go further to organize search-and-rescue for any country's pilots— Минобороны России (@mod_russia) 20 октября 2015
Russia has repeatedly expressed readiness to cooperate on the flights safety issues with all countries interested in the elimination of international terrorism in Syria, he emphasized.
"Let me remind you that Russian and Turkish military departments organized a hotline aimed to prevent unintentional air incidents in the skies over Syria." Moreover, such a coordination exists between Israeli and Russian Air Forces' command centers.