How Chirp Radar Works - Humminbird HELIX Operation Manual

H CHIRP R
OW ADAR
The word "radar" is an acronym for "Radio Detecting And Ranging." A radio transmitter sends a quick microwave pulse, and then a
receiver listens for that signal's echo when it is bounced back from something in its path. The returning signal is processed by a
computer to determine its relative distance, position, and bearing. This information is graphically displayed on a view for you to see.
Other boats or ships, navigational markers, and landmasses are referred to as targets.
By knowing how long it takes for a signal to return, the distance to a target can be determined. As the radar antenna scans through
a 360-degree rotation, it can show where the target is relative to your position. By repeated scans, you can see which direction
another boat is moving. How a target is displayed on the screen depends on the target's height and size as well as its material and
shape.
CHIRP Radar uses pulse compression technology, which sends continuous radar pulses to provide more detailed returns and better
target separation.
CHIRP Radar provides:
• Improved range resolution and reduced sea clutter.
• Excellent short-range detection and enhanced target detail.
• Better separation quality.
WARNING! How to interpret the radar display is not included in this manual. The captain is responsible for the proper use of radar and
the safety of the vessel and its passengers.

How CHIRP Radar Works

W
ORKS
Boat and Surrounding Targets Radar Display
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