Jose wrote:
I have to practice starting a stopwatch?

No, one should practice =remembering= to start a stopwatch.

Actually, with some of the brain-damaged UI's some digital watches
have, you really do need to practice starting it.

I actually prefer a plain sweep second hand clock in the panel (one of
those good-old 8-day windup things work just fine). Glance at the
thing when you start outbound, when the second hand gets back to the
same place, turn inbound. Correct as required for wind.