On Thu, 05 Jul 2007 10:28:55 -0400, "Reginald P. Smithers III"
wrote:

Short Wave Sportfishing wrote:
On Wed, 04 Jul 2007 18:22:49 -0400, HK wrote:

Price is not an issue: there's really not much difference in pricing
between a good transom mount and the through hull.

As long as the transducer makes contact with clean water, there is no
difference between the two systems. The key is to keep the transducer
in the water flow and not where air and foam can interrupt the sonar
signal.

It's really a matter of appearance.

I have heard that it is tougher to get clean water with a transom mount.
I have always just shot thru the glass, because it is only a depth
finder, and not a fish finder, I have never had a problem. The first
time I did this, my marina told me they shot fish finders thru the hull,
and as long as there are not voids in the fiberglass (ie solid glass)
they never have problems shooting thru the glass.

My Ranger has a very odd transom and I don't have a problem with clean
water - even in turns. It's all in how you set it up.

Through glass is never going to be as sensitive and, although it's not
happened to me, can distort the returning echo giving a false depth
reading. Note that it's never happened to me.