I bought a 10 inch diameter wall clock out of a catalog (for less then 10 bucks), had a friend (machinist) hollow out a slot (not too deep) in a small block of PVC so the clock fit in the slot snugly and wouldn't fall over, took off the hour hand and placed it at the end of my lane in a community pool. You may need a little silicone caulking if you find it getting too wet.
It worked great until I decided I couldn't swim alone and had to find a program.
I bought a 10 inch diameter wall clock out of a catalog (for less then 10 bucks), had a friend (machinist) hollow out a slot (not too deep) in a small block of PVC so the clock fit in the slot snugly and wouldn't fall over, took off the hour hand and placed it at the end of my lane in a community pool. You may need a little silicone caulking if you find it getting too wet.
It worked great until I decided I couldn't swim alone and had to find a program.
