INTRODUCTION
Praktik sonars are designed to measure the depth of a water reservoir and
search for promising fishing spots.
The principle of Praktik sonars operation is based on the emission of
ultrasound waves into the water by a transducer and the subsequent reception
of echo pulses reflected from the bottom or other objects. The probe beam is
a cone, the top of which is a sensor, usually located just below the water
surface, and the base is the bottom. When an ultrasound wave encounters an
obstacle in its path, then part of it is reflected and returned back to the
transducer, and the receiver screen displays information about the presence
of an object.
The figures on the right show typical pictures on the sonar screen and the
information on the water reservoir in summer and winter corresponding to
these pictures.
It is very important to understand that the sonar does not display a three-
dimensional representation of the water column on the screen, but only its
projection onto a vertical plane passing through the middle of the sounding
cone. This creates the illusion that all objects detected by the beam are located
under the sensor.
The principle of modern fishing consists not so much in finding fish, but in
determining the traditional habitats of fish. The main thing is to get an
understanding of the reservoir and the presence of fish in it. The role of the
sonar in solving this problem can hardly be underestimated. However, to fully
understand the picture displayed by it, you need to gain some experience.
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