we flew attack runs for hours on end with a wing of three tbolt jets and even when we chose a slow assault mech target we mostly had to use at least one of our backup narcs to hit him. a couple of times even all three pilots would fail to hit depending on which attack vector we had relative to his movement. so if your not a pilot with the suicidal tendency to fly low or a mech pilot that has a liking to stand in front of assault class mechs you really have a lot less than 99%, i would even say near to impossible chance to hit even a slow moving target.
and btw when you are in front/behind them to fire it they spot it easily. even more so because you have to go active.