It's interesting to me that those fonts seem to include ink traps: curious if this has anything to do with the display tech that's used in the cockpit
replies(8):
> The principle of ‘ink traps’ has existed as long as typography has: it is a small indentation at the junction of letter strokes which ‘traps’ the ink on small characters, so that it doesn't block the junction and affect the legibility. In the case of B612, the ‘light traps’ accentuate the counterforms 7, particularly for the sharp angles� The indentations are always well distinguished, even at a small size, and the contrast between the different strokes of the character is reinforced.
> An incise is a small serif which interrupts the regularity of the vertical line: here it allows to accentuate the clarity of the leading stroke (top part) of the vertical stem 8 to avoid it being rounded off when antialiasing.