Downvision Overview - Raymarine LIGHTHOUSE 4 Operation Instructions Manual

Multifunction display operating system

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Sonar is effective at a range of speeds. In deeper waters the CHIRP

bandwidth is automatically optimized to improve bottom lock and the

detection of moving objects (e.g. fish) in the wider water column.

CHIRP sonar screen example

Fishfinder app

DownVision™ produces a wide-angle side-to-side beam and a thin fore-to-aft

beam. The coverage of the DownVision™ beam is a water column directly

beneath and to the sides of the vessel.

DownVision™ beam

DownVision™ is effective at lower vessel speeds. In deeper waters the

CHIRP bandwidth is automatically optimized to improve bottom lock and the

detection of moving objects (e.g. fish) in the wider water column.

The wide, thin beam produces clear target returns. The use of CHIRP

processing and a higher operating frequency provide a more detailed image,

making it easier to identify bottom structures around which fish may reside.

DownVision™ screen example

Troubleshooting