[maxerickson]

It's designed to be dependent on their proprietary implementation.

MGRS is (approximately) a dense encoding of UTM coordinates, at similar precision it's a lot less memorable than 3 words:

4QFJ 12345 67890

(from https://en.wikipedia.org/wiki/Military_grid_reference_system )

But it does have the property that coordinates are easy to compare to each other. Less precision can be used just by dropping digits:

4QFJ 1234 6789 - the 10 meter zone that the 1 meter zone above falls inside

4QFJ 123 678 - the 100 meter zone