Not much of an explanation on navigation, but an excellent explanation of our travels through life! Thanks

On Wednesday, September 23, 2015 at 3:35:34 PM UTC-7, Bob Whelan wrote:
Maybe a bit of rocket science will help...

http://www.liveleak.com/view?i=f95_1422455171 (1min:40 secs)

You're welcome!
Bob W.