Sonar Technology - Humminbird Fishin' Buddy MAX Operation Manual

Sonar Technology

The fishfinder automatically determines depth and makes adjustments to keep
the bottom and fish visible on the display.
The fishfinder uses sonar technology to send sound waves from the transducer
into the water. The returned "echoes" are plotted on the display and represent
something that was detected by a sonar return at a particular time. As both the
boat and the targets (fish) may be moving, the returns are only showing a
particular segment of time when objects were detected, not exactly where
those objects are in relation to other objects shown on the display.
The returned sonar echoes are displayed on the screen. As a new echo is
received, the historical data scrolls left across the view. Boat speed, wave
action, bottom hardness, water conditions, and transducer installation can all
affect depth capability.
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Sonar Technology