After several years of "beating the banks" I've decided that in order to
progress as a bass angler I'm gonna have to learn to fish structure.  I read the
excellent series "So you want to learn to fish Toledo Bend, picked up some
excellent tips from Catt and the guys posting on that thread.

I went out
with a guide on lake Fork summer before last - when it still had water in it. 
He explained about using crankbaits, C-rigs, and Texas rigs to fish submerged
bridges.  I learned a lot; mainly that my retrieve was way too fast.  Next step
was learning to find structure.

Last year I bought a Humminbird side view
sonar unit.  I also upgraded to the latest Navionics PC mapping software; I have
the 2008 Navionics chip in the 'bird.  I've been using the combination of
detailed lake maps and side view sonar to locate some of the underwater
structure on Fork.

What I do is, mark the various bridges on the
Navionics PC software, upload to a MMC chip, then put this in the Humminbird. 
The points I mark transfer to the GPS map.  Then I go out on the lake and use
the side view to find the precise location of the bridges and culverts.  The
Humminbird has a function that allows you to capture the screen and download to
the MMC card as images.

Here are some side view pics I took in October on
Fork.  Maybe this will help anyone who's thinking of buying a side view unit. 
In my opinion this thing is light years beyond traditional sonar.  I'm still
learning how to use the side view but so far results are good.