OK, I don’t understand a darned thing other than that red triangle xyz is a bandit....am I right?
I'm not an A-10 pilot and had nothing to do with this MFD or any other military MFD.
My educated guess: the XYZ's look like the good guys, where XYZ would be replaced by real aircraft identifiers so members of the same attack group can identify and track each other. It looks like the red triangle points to a ground target, probably assigned to aircraft red XYZ. Since red XYZ is a different shape (diamond versus rectangle) than the other XYZ's, red diamond must be own aircraft. The red target looks to be an SA6 missile site. The 15 next to the target would indicate the effective range in nm for the target (SA6 missiles have a 15 nm range.) The map range is 20nm so I'm within the danger zone for my target.
Of course this is all simulated because my map coordinates put me in south central NY state. There are lots of 'rats in NY, but thankfully, they don't have SA6's.