On Saturday, May 2, 2015 at 9:48:07 AM UTC-7, son_of_flubber wrote:
I still think that 'boxing the wake' (with the tug pilot's OK) on a reasonably calm day is a very good skill building exercise and that it is well worth the small risk above 1500 AGL or so.

There is *no* risk - it's standard operations, and a tow on a good soaring day or rotor is likely more stressful on the rope and towplane.

5Z