Based on the one shown on the martian embassy on Earth. Still not convinced on the font I used
(Edited by L2C1)
I rastered the layer because the "C" in MCR looked very different from the original screenshot, so I made one out of a circle in PS and pasted over it
Here you have!
https://mega.nz/#!389xzYqC!O708oNZ-EQJ2J34Owadg110Rlo6FzpvIJrNS9YnDBi0
I only use Photoshop, and I'm more like a noob
Found this on ArtStation, I think it has the looks for being a UNN dreadought
I think it is some kind of message/metaphor from the UN to Mars, like F#$% you we have ocean and boats!