"Wayne.B" wrote in message
...
You probably know this already but per the COLREGS boats equipped with
radar are supposed to use it:

Rule 7

Risk of Collision

(b) Proper use shall be made of radar equipment if fitted and
operational, including long-range scanning to obtain early warning of
risk of collision and radar plotting or equivalent systematic
observation of detected objects.


'Proper use' does not compel you to have your radar going at all times.