Originally Posted by tpbrady
The big new feature on the Furuno and Garmin radars is the use of doppler to ID moving targets automatically. That's a big deal at any range especially in close. I am not sure what I need to track at 48 miles unless I am trying to triangulate my position by radar bearings off of distant points of land. The radar horizon on most trawler installations for surface targets is far short of 48 miles.
48 miles isn't the horizon for severe weather...even 72 miles was too short for me sometimes offshore.
ARPA has been around for awhile for tracking targets...how does the Doppler work differently? (only guessing it actually sees the movement rather than some abstract calculation ARPA probably used)....