themagni
Contributor
I dive with a computer and a Timex Ironman 100m ($45). You may not want to push all the buttons at 100 ft. but to just tell time it works fine.....and has BIG numbers.
I had a Timex Ironman for about 20 years, and it worked great as a timer for diving... until the time I forgot to start the timer at the surface. I pressed the button at 45 feet, and it was gone forever.
Normally I just take my daily-wear watch with me when I dive as my backup. (I can't wear it, but I generally take it with me anyway.)