Kingfisherman, I have to ask, if your in a situation (fog, darkness) that requires radar and you have a near collision with a fiberglass boat, why are you running on the 4 mile scale?
On the occassions that I need my radar it is never set higher then a 1 mile scale and usually set at .25 or .5 mile scale. I run a 1622 Furuno with a 2.2 kw radome.

A couple suggestions, 1) adjust everything manually, if you use auto settings your not getting the maximum potential out of your radar, this goes for ff and chartplotters too. 2) Don't waste to much time on that 4 mile range, you'll miss targets inside .5 miles.

If you have your radar dialed in you should be able to see logs and birds, I can.

Ignore last sentence if your radar is less then 2.2 kw.