There are videos available from most radar mfg. I've seen them at West Moron
and I think most store have a rental arrangement..

I had one for my Furuno 1721 and it was good, with all the basic info you
need to use the unit effectively.

There is also Starpath Radar Trainer. It is a computer software program that
allows you to learn various radar navigation on your computer. I have an old
DOS version that is still very good. I suspect the Window version should be
even better. It is also available for the Mac.


--
My opinion and experience. FWIW

Steve
s/v Good Intentions