Read what Fighterpuke wrote. He wants to be able to turn off his radar dot on his own side's radar. So two account weenies can't spy on him when he is on a NOE mission. I've asked for this feature before, used to do a lot of NOE until it became pointless.
If you want to rationalise this in WW2 terms, most aircraft had an IFF transponder in WW2. This gadget told radar operators they were a friendly aircraft. Some planes at least had an on/off switch for their IFF. All that would be needed is a ".iff 0" or ".iff 1" command.