Warner Springs, CA tracks the times.
They note the time that you pass by the office window under tow, and again on landing. So far it's always within a minute of the time hack I make from takeoff to landing.

On Monday, March 25, 2013 5:22:40 PM UTC-7, Scott Alexander wrote:
Do any commercial gliderports use an .igc trace to log flight times?



Of the commercial gliderports you have been to, how were they keeping

track of flight times when they rented a glider to you?





I am looking for an electronic way to automatically log rental glider

flight times.