My Father is flying paraglider for more than 20 years now... he bought a VHS Casette of this and i saw it maybe 50 times when i was a little boy. it never got boring :D
I believe that the Skywatch is actually an inclinometer. Back then, you had to be sure you could make the glide to the LZ. This has been one of my favorite videos for years. This and SuperMax 2, of course! :-)