If you were trying to land on a specific site though, couldn't you drop down a dozen or so transmitters at the potential landing site? The assign them a location, and have them transmit the relative location to anything landing near them?
How would you drop them? Don't think a radio transmitter would survive a hard landing, so you will need a proper lander (with altimeter) for each transmitter. And at that point you can just strap your actual payload instead of the transmitter.
The point would be you could drop them a bit randomly, once they land, find out where they are, and tell them where they are, to then talk back to the payload as it's landing.
It's the moon, even a hard landing isn't that hard.
