I've been using a Raytheon R20XX with a 9" CRT for 15 years. The set gets a pretty good workout here in Puget Sound. I do a lot of sailing in pretty nasty mist and fog and am comfortable with radar tuning and plotting.

It is hard for me to imagine 'better target resolution' - I can pickout flocks of seagulls on floating logs at 300 yards and fisherman in 16' dinghys at 1/2 mile. When I am navigating thru the ferry lanes or the Vessel Traffic system I can locate the bow and stern of a ferry or ocean going ship within a few feet. When I put the EBL on the bow of a ferry moving at 18 knots and one mile distant and then compare that bearing with what I see in my Nikon binoculars - the two bearings are identical.

When I want to pickup a mooring ring in heavy fog - I put the radar on 1/4 mile range and can motor the bow of the boat to within a couple feet of the mooring ring.

In open water I can easily use the radar to locate a gill net mothership and the tender setting the net and much of the time I can even see the net floats.

I've crossed the Straits of Juan de Fuca many times in heavy fog and use the radar to navigate to a buoy - in 30 yard fog I can sail the boat so that the bow is pointed directly at the buoy as it comes into sight.

So - how can I have 'better target resolution'? What is "better"?

I to would like to get a new radar but am having trouble understanding the benefits of HD radar and broadband radar.