Seems like a good tip
Looks as though you don't need to identify the target useing this method. I haven't had any luck getting precise range measurements useing radar, since as far as I know, there is no numerical readout of range. There is a mod out there that addresses this, but I don't think it was made RFB compatable yet. IRL, there was indeed such a readout.
I've also used the sonar ping method, but also found that faulty on occasion. The way I do it is time how long the ship takes to cross the 0 bearing line of the scope, and calculate speed useing the ship's length. There are lists out there which provide the lengths of in game ships. Of course you need to ID the ship, a challange to say the least on a pitch dark night, but it works like a charm
