Air Canada 007 is a Vancouver to Hong Kong flight. They are talking to Magadan Control. My interpretation is Air Canada 007 is requesting a higher altitude and Magadan replies that they can climb to 10600 meters but can only stay at that altitude until they reach waypoint DATIR, then they would have to descend. Waypoint DATIR is located on the G212 airway (between Takhtayamsk and Nikolayevsk-Na-Amure) at N58 36.3 E150 41.7, this is in the Magadan CTA/FIR area. Was this recorded off a VHF or HF frequency ? I'm guessing HF ? Very interesting, if you have more it would be great to hear them, or better yet a live feed. DJ