(VOVworld) - The United States and Russia are set to sign an "understanding" specifying how pilots can avoid each other over Syria as the two powers conduct separate bombing campaigns, a Pentagon spokesman said on Monday. Captain Jeff Davis said the memorandum of understanding would likely be signed Tuesday. The measure has already been fleshed out and just needs final confirmation. Davis stressed that the rules established with Russia are not part of a broader agreement on how the two countries could operate in Syria. Russia asked for talks with the United States after Moscow began bombing Syria on September 30. The United States is leading a 60-plus member coalition targeting Islamic State jihadists in Iraq and Syria and has been carrying out frequent raids for more than a year.