LINK to my website/blog for an attempted brief discussion of DSC capabilities for VHF radios.
https://www.alt2energy.com/2022_05_dsc_outline/0527_dsc_outline.html
LINK to some information about overlaying Simrad radar on NOAA charts using OpenCPN on a PC.
http://www.alt2energy.com/2021_radar_overlay/radar_overlay.html#K.OK._092021_