fish finder & depth meter for kayak fishing

Hi,

I use a Piranha Max 10 with the transducer mounted inside the hull of
my OK Prowler to fish offshore in Hawaii in water up to 400'. It works
great. Be sure to use an epoxy designed to be used to attach to
polypropelene and stir carefully so as not to introduce bubbles into
the epoxy.

SW
wrote:
Hi,

I am looking for a small, light, simple, and *cheap* fish
finder/depth
meter for fishing on my kayak. I do *not* need fancy displays, only
something capable of telling me basically what the bottom looks like,
or maybe even locate fish.

Ideally, it would be battery-powered, totally portable (not rigged
permanently to the kayak). I have seen one model with two little
sensors which can be hooked to the fishing line and a wrist-watch
with
a basic black & white display. The price was 80 bucks though. Are
these any good?

Is there anything cheaper out there?

I would use it in swamps, creeks, the Intercoastal River in
East-central Florida.
Any advice on models?

Many thanks in advance,

TN