Numbers above planes on map?

Why do people have these numbers above them on the map? Sometimes it is a big number, sometimes small. Most of the time it is adding up, but then other times, it is subtracting. Is it XP?

That’s their altitude relative to you. The plane shown in the picture says “-20”, that means they are 2,000 feet below you. It would be the same for aircraft above you. Let’s say that an aircraft is at 35000 feet and you are at 25000 feet, it would say “+100”.


You can read about this on the TCAS section of our guide (with examples):


@Dylan_M & @Cameron Thank you both! This makes much more sense now…

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