[Sportsandrec] Ideas needed!

[mrmikie273 at gmail.com]

I am trying to follow someone in a kayak. Most of this is done on the ocean.
I have tried  different bells. But they stay silent on smooth  days. I tried
a pocket radio but it would lose the station too often. There are dog
training & hunting collars. That come with a remote & most are water proof &
work a quarter mile away & more but the starting price is at about $300 

Anyone have better idea or lower cost idea.

Thank you

Mike