On Thursday, April 30, 2015 at 10:49:12 AM UTC-4, Tango Whisky wrote:
Le jeudi 30 avril 2015 16:33:36 UTC+2, Bob Pasker a écrit*:
might I draw your attention to this diagram in the FAA's Glider Flying Handbook of aerotow visual signals?

http://funkyimg.com/i/WrPp.png


When I compare the signals on tow in your link to the signals on tow in the link of son_of_flubber (which indicates just the opposite), I think that the invention of the radio was a rather good thing.

This http://www.soaringsafety.org/briefings/signals.html follows the dictum "Pull the tug's tail and point him in the direction that you want to go."