a98 CPT 100, bottom view,

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum No Free Rides,

Like traditional 50/200kHz sonar plotters, the plot of the CHIRP sonar and DownVision sonar of an ax8 MFD, eSx8 MFD, CP100, and Axiom MFDs it historical. When viewing the plot, the imagery display farthest to the right will be the most recently sounded while the imagery to the left will be increasingly older from right to left. Like Raymarine's traditional 50/200kHz sonar plotter, the CHIRP sonar of the ax8 MFD, eSx8 MFD, CP100, and Axiom MFDs support the A-Scope feature (MENU->DISPLAY MODE SELECT MODE->A-SCOPE) which is designed to provide instantaneous imaging of the water column beneath the transducer.

Regarding the area of coverage provided by the beam of the CHIRP and DownVision sonar elements of the transducer at an depth, Please click here to view a FAQ addressing this subject.