HawkEye DT1H Bedienungsanleitung

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DT1H Getting Dash Lines When In Use

You may be experiencing the diffusion of the sonar signal in many directions resulting in

signal weakening through Refraction or Backscatter, primarily due to the material properties

of the areas.

Backscatter: The deflection of acoustic signals in a scattering process through an angle

greater than 90 degrees. Backscatter is the term commonly used to describe the return of

energy from the seabed to the receiver in an active sonar.

Refraction: The change of direction of a sound beam when passing obliquely from one

medium into another, where its wave velocity is different.

Refraction is a type of ray bending that will affect acoustic returns for proper sonar imaging.

This occurs when sonar pulses encounter thermal zones, silt, salinity changes. Under these

conditions the beam can be refracted sharply to the seafloor severely limiting range. If you

are experiencing one of these conditions, first verify that the sonar is working by placing

your ear up to the sensor and listening for the tick. If you hear the ticking sound, you may

have to discontinue use under these conditions.

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