Re: Well done, SpaceX ...
I'm not sure GPS would be the limiting factor regarding landing accuracy. Ships and planes managed to navigate pretty accurately without it.
I would have thought it was more the control / thruster technology along with the limited meteorology.
Upper atmosphere winds can now be measured, modelled in real time and fed back to the craft prior to entry
Doubtless the 60s and 70s capability was pretty crude to non existent by todays standards.
Biting the hand that feeds IT
