Radar information - what's the altitude?
When being given an RIS, I don't like the current practice of advising aircraft that they have conflicting traffic at (for instance) 10 o'clock "2500ft below" or "1500 ft above". 2500 ft below isn't very helpful to me when I am descending, because I have to do some arithmetic and by the time my slow brain has worked it out I am probably 1000 ft closer to the traffic than I was! I'd rather be told that it is at a particular altitude - "3000 ft", so that I can quickly and easily picture where the traffic is, and assess the significance.
Why did the practice change?