Choosing the right fishfinder transducer is a task that requires some basic knowledge
on the technique of a transducer, the model of fish-finder and some basic experience. A transducer can be attached to a boat in many ways. There are basically two types of finders: fixed mount and portable..
Information relating to a fish finder transducer can sometimes be a little complex to decipher. Transducers come in both high and low frequencies. 50 to 100 kHz is the range of a low frequency transducer. Lower frequency can be equated to greater depths since the sound waves in this case can travel for a long distance. 180 to 200 kHz is the range for a higher frequency model.
One important point to note is that all fish finders are designed to work only with a specific or a couple of frequencies. When you intend to buy a transducer, you need to ensure that the model works with the frequency of the transducer. This rule applies to both kinds of fish finders.
When it shows yellow, it means that the object is not as dense as the red. When you look at the screen, you will notice red arches that show up in the blue area. This is showing fish movement. The fishfinder will also show big balls of red, which usually means that there is a bait ball underneath the boat.
It uses a highly sensitive digital filtering process that enables the user to troll faster and see the fish that are under and around the boat. Also, in shallow water it cuts through the clutter and makes it easier to see the fish at that shallow water depth. This is the usual depth that the average angler fishes.
If you are in the market for a new fishfinder, it is better to spend the extra money and buy a color model. Not only will it save you time and eventually money, but it will make it much easier to see the fish that are around your boat.