Humminbird 500 series Operation Manual page 22

Classic layout: The top portion of the display presents a historical log of sonar
returns from the 200 kHz down-looking sonar beam. The bottom portion of the
display presents a historical log of sonar returns from the 455 kHz right- and
left-looking sonar beams. New information appears at the top, and scrolls down
the display.
Depth
Temperature
Left Side
455 kHz Sonar
History Window
Water Surface Line for 455 kHz
Sonar History Windows
17
200 kHz
Sonar
History
Window
Right Side
455 kHz
Sonar
History
Window