i dont realy do hard on war fare and when i use radar its for monitering movments of shipping such as loads of merchant vessels and i use it when its not possible to keep track by sonar (english channel good idea of what i mean)
radar i use to find merchant vessels and many of them against warships not so much im either too busy doing something else
all of the above is when im in blue water which is rarely might i add
under ice theres no call for radar of esm or any mast