On Tuesday, January 24, 2017 at 11:58:40 PM UTC+3, wrote:
All you need is to be able to see him coming a mile or two out, and make a 90 degree turn and get out of the way.

Darryl is right. It's tricky to know at those closure rates on which side/above/below he will pass even if you see him coming from several miles away. not a fun situation.

If you fly straight and level for a few seconds and he's not changing position in the canopy -- and ESPECIALLY if he's on your horizon and that's not changing -- then it's time to do something different.

You can probably lose 500 ft faster than you can do anything else. And if it still looks dodgy that will also give you speed and energy to try something else -- climb again, turn to one side etc.