Sounder - a device which establishes the location of the object under water bottom topography using sound radiation. These are displayed on the screen, where you can see the distance to the bottom or fish. This is an indispensable thing for professional and sport fishing from a boat or boats. To choose a good depth finder is necessary to evaluate a number of important aspects.
1
Transmitter power. The larger it is, the better and more accurate signal. Are seen to be the smallest of details even in dirty water at a very great depth. This indicator can be found in the data sheet device. Usually it is defined by two parameters: the averaged (RMS) and peak power. Take into account the average, which is calculated from the maximum.
2
converter frequency of the radiation. In different models, it varies from 50 kHz to 200 kHz. Such high-frequency sonars as Humminbird PiranhaMAX x 170, better detail the objects, but only at shallow depths. Sonars operating at low frequencies, distinguished by a large angle of coverage at a considerable depth. One flaw - a bad definition.
3
The angle of coverage. The acoustic wave from the transducer is distributed into the water surface in the form of a cone. The smaller the coverage angle (9-24 degrees), the bottom of the reservoir is drawn distinctly less "dead zones". With such a sonar to detect fish difficult. Instruments with a wide beam at 45-90 degrees worse scanned the bottom, but it's good looking fish.
4
The number of rays. Their number depends on the drive type. Budget sounders emit one or two beams, more expensive - 3, 4, 5 or 6. There are 3D-sonar, which broadcast the image in a three-dimensional projection.
5
Display. The most essential characteristic - the size and screen resolution. The smallest display has a diagonal of 3.5 inches, and the largest - 12 inches and larger. Resolution color or black and white display is from 64x128 to 1024x768 pixels. It appeared sonars with a touch screen in recent times.
6
We use the built-in GPS. It makes it possible to save all objects and finds on the map.
7
Lowrance is a well-known leader in the world of echoolotov. Her founder was the first to redo the military installation in a purely peaceful apparatus. Amaters may well do with the instruments of the JJ-Connect Fisherman series or Garmin.
The acquisition of the echo sounder displays ordinary fishing to a new level. This is a difficult mechanism, the successful operation of which requires some skills and knowledge of the foundations of fishing.
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