Hey guys, I'm a glider pilot and can agree with most things that have been said above. As long as both pilots use there common sense then the risk can be reduced as much as possible. Like has been said we have better visibility, we don't usually do erratic flying as it uses up alot of height, so the only time we do this is near to our airfields. Everything else about glider flying (thermals, wave etc) is all spot on, two weeks ago I had a great flight where I took a winch launch to 1500' and climbed to 13,500'