The actual information is in the two referenced patents: - https://patents.google.com/patent/US8014909B2/en https://patents.google.com/patent/US8014909B2/en -

The actual information is in the two referenced patents: - https://patents.google.com/patent/US8014909B2/en https://patents.google.com/patent/US8014909B2/en - https://patents.google.com/patent/US9162752B2/en https://patents.google.com/patent/US9162752B2/en I've had a brief look at the prior art and summary of the first. It seems that the innovation is that sensors are put on the reference vehicle (the patent seems to be intended to the area of aircrafts and carriers), so that the position/speed are computed in a relative fashion. It seems that at the time, attempts to solve this problem were based on other means external to the reference vehicle (e.g. cameras on the controlled vehicle). I guess that the idea behind the patent is that at the time this was, for example, expensive or counterintuitive, but it doesn't seem anything really worthy IMO. I'm not an engineer though. Regardless, I think this should not deserve to be renewed for more than a few years, as in the timespan 2004-2024, technology has changed considerably, and this doesn't seem to me anything innovative anymore, even in the last ten years.