Name: Humminbird HELIX CHIRP GPS G2N
Brand: Humminbird
Rating: 4 (1 reviews)

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Down Imaging Sonar

U  D I V

The images you see on the Down Imaging display are produced using sonar technology. Each time the unit pings, a strip of data

representing all the echoes received by the transducer are put together on the display to form the image that you see. Like

traditional 2D Sonar, the sonar history scrolls left across the screen.

Down Imaging beams “illuminate” the bottom contour, structure, and ﬁsh. The beams are wide (side to side) but very thin from

front to back.

Sonar History — Historical returns scroll left across the view.

Down Imaging View (HELIX 9 CHIRP DI GPS G2N)

dark shades

shadow

light shades

white

streaks/clouds

Use the light and dark parts of the display to interpret the objects under your boat as follows:

Dark shades represent soft returns (mud, sand) or descending terrain.

Light shades represent denser terrain (timber, rocks) or rising terrain. A very hard bottom may appear as white on the display.

White Streaks or Clouds may represent ﬁsh on the display.

Shadows are not caused by light but by the lack of a sonar return. Objects standing on the bottom cause a sonar shadow to

appear on the display. The longer the shadow, the taller the object. Fish may also cast shadows. You can use the shadow to

interpret where the ﬁsh or object is located in relation to the bottom.

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Humminbird HELIX CHIRP GPS G2N Specifications

General