Features:

Real time display of seconds lost (or gained) during a maneuver or instruction.

Ability to change assigned speed at any time while retaining the cumulative difference.

Note:
GPS mile is not the exact measured mile. Accuracy will decline after a few minutes.

TURNS: Make sure HOLD has been pressed. While at speed just before
the turn, press that speed. If the speed changes, press the new speed
at the apex of the turn. Once you get back to the assigned speed,
press HOLD. Display shows how many seconds you lost.

STOP and GO's: Make sure HOLD has been pressed. While at speed just
before the stop, press that speed. Stop for your calculated time. If
your speed is to change, press the new speed while stopped. Once you
get back to the assigned speed, press HOLD. Add your 15 second
allowance to the time shown to determine any time lost or gained.

UNUSUAL SITUATIONS: If you're coming upon a slow vehicle, press HOLD
then your current speed before you have to slow down. Once you pass
and get back up to speed, press HOLD to see how much time was lost.