In article ,
"Jim & lil" wrote:

Hello,
I have a Hydropool which is a swimming pool that shoots a water jet
down the center and you can swim against the current. I swim with a face
mask and snorkel as I find it too hard to turn my head for a breath of air
(broken neck a year ago) so am looking for a clock that will work under
water. I want to be able to suction cup it to the floor of the pool so I can
time my swims... I have googled this to death but can't find
anything...anybody ever seen or heard of this?...Thanks... Jim

A local fellow here invented the "Time Window" which is a miniature
goggle-mounted full-function stopwatch designed for competitive
swimmers. We used to do the assembly of the units for him.

http://www.popularmechanics.com/outd...s/1277556.html