What is the number above planes on the map

1

When I am mid flight and look at other planes close to me on the map. Above the username there is a number, such as +40, -23, 00. What does this mean?

Thanks in advance

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2

It refers to the plane’s altitude compared to yours so:

+40 means 4000ft above you
-23 means 2300ft below you

00 means that plane is at the same altitude as you

Hope that helps!

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Thanks! Wasn’t expecting such a quick reply.

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No problem! Always happy to help!

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