Ive been water hunting since 1995 (longer than that if you count floating land machines)
but owned actual water machines since 1995
Ive had a few get water logged - as soon as it happens - you will know...it will go haywire
get it out of the water- get box open and get the water out immediately
if you dunked it in SALT WATER - flush it out as fast as you can with fresh water - i had to use
my bottled drinking water once.
if at a fresh water spot - just get water out and let it air dry in the sun
Had a couple of my Whites PI Pros leak
and a couple of my Fisher water machines leak too
I managed to save them all
Usually the reason for leak was the gasket - having machine in a hot vehicle
then taking it in to cold water was usually the problem
had the same problem with an underwater camera too - it was in shade when we got to beach
the sun moved and was beating down on it - I found a nice ring and yelled to my GF
to bringing it out - she got off a few pics before it flooded
Funny ...this was the last pic we were able to take with it
was not able to save the camera