Towplane @ 70 kph
70 kilometer/hour = 63.794 foot/second
200 foot towrope / 63.794 foot/second
3.135 seconds = 3+ Mississippi which seemed enough in that situation.

07-03-1994 Keystone Gliderport with Tom as CFI for transition to glass.
Towplane backtaxis after hook-up.
Towpilot shouts, "I'm getting pretty low, but I think I got enough for one more."
I pull the plug and shout, "I'll wait."
Could feel Tom's smile on the back of my neck.

In a crisis, you may not rise to the occasion,
But, you will sink to the level of your training.

Thanks, Tom