I bought a stopwatch after 1 or 2 dual nav ex's thinking it may help or make things easier.
Na, didn't.
Used it once on a solo nav but kept forgetting to reset the bloody thing. Luckily I had the trusty wristwatch to hand (or at least wrist!) Not used the stopwatch since. Bit of a waste of money really, had to try though.
I suppose it is what each of us feel most comfy with.
147,