Coventional Sonar vs. Down Scan Imaging

Fishton

Sealiner
Conventional sonar (50/83/200kHz) has a cone shaped sound wave, and DSI (455/800kHz) has a beam.

When looking from the rear, they* will look identical.

boat%20rear%20coverage1.jpg


Looking from the side, conventional will look the same* as from the rear, because it is a cone.

boat%20side%20coverage%20cone1.jpg


But looking at DSI from the side, it is VERY different, because it is a beam.

boat%20side%20coverage%20beam1.jpg



* Using the Airmar P66 on 50kHz
 
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