Today’s flashers are telling people more than what they know. There is more to a flasher than just checking depth, checking out where the targets are at in a water column, or watching your jig.
A flasher will tattle on transition line, weeds, sunken trees and other structures as long as you under stand what you are looking at with the unit you are using.
When looking for a transition line that I am aware of while using my MarCum LX-5 the NBT button is pushed to activate the narrow band on the transducer. The narrow cone angle will help put me a lot closer to the transition if not right on it.
When approaching an area that I know to have a change in the bottom either from mud to rock or mud to sand, a line of holes is drilled starting above the soft bottom and working my way to the hard pan. The transducer is dropped in the first hole while using the narrow cone angle and the gain in turned down so it is showing the bottom as yellow/green. Now checking every hole in line, when the bottom shows as that solid red line because of the signal return, you have found hard bottom or in other words, the transition.
Looking for that sunken tree or brush pile starts in the same manner, when arriving to the area you know holding the wood, drill a series of holes over where you believe the structure to be. Then walk around with the flasher checking each hole while looking for the flasher to light up a series of marks in red, green and yellow bars staying solid plus seperated and not moving. You have now put yourself on top of that tree or crib.
While looking for your transition line or other structure you can usually tell when you are getting close to your object. Most times the flasher will start spilling the beans on fish below close to there hang outs.
These are just a couple of things today’s flasher can be used for that I believe are ignored whether on a lake or river. Make sure when you purchase your new flasher that you get out and play with all the bell and whistles. Familiarizing yourself with your flasher will only make you better at understanding how your features work and what it is the unit is telling you. Crank the gain up and down to see the results and where you like the setting to be. Play with that zoom, whether you lock it to the bottom or move it around in the water column on suspended fish. If you have a unit with dual cone angles, use them, clear up clutter or get closer to the structure by narrowing down your cone angle. Make sure you are getting everything out of your flasher that it has to offer you!!
Happy flashing people 
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