Question: I have my transducer mounted on the back of a 21 ft pontoon. Does the transducer read to the front or rear of the pontoon boat? What are the sonar patterns and distances and size of the pattern?
Name = Doug
Answer: The transducer takes readings directly under where the transducer is located.
Now, there are four considerations to be made in order for your fishfinder to be considered a good unit.
- You need a high power transmitter
- You need an efficient transducer
- You need a sensitive receiver
- You need a High Resolution/Contrast display
A simple way of describing what your transducer is doing would to be compare it to the way a "BAT" navigates its way while flying at night. It sends out a high frequency sound wave which bounces off and object returns to the bat’s ears which send the information to brain which then interprets it and tells the bat which way to go to avoid a collision. All this is done almost instanteously.
What your transmitter is doing is taking a electrical impulse, converting it into a sound wave, which is then transmitted into the water. This soundwave hits and object and rebounds to the surface where it gets converted back into an electric signal which is then amplified by the receiver which then shows up on the screen as a continuous line. This whole process is repeated continously and at many times per second. In order to give you an idea of how fast this happens, the speed of sound in water is approximately 4800 feet per second.
Here is another analogy to help describe the transmitter coverage. Think of the beam as being what you see from a flashlight, the outside edge of the beam only goes about 1/2 the distance of the what the center of the beam does. It is what you would call cone shaped.