Lenguador

That reminds me of a joke.

A museum guide is talking to a group about the dinosaur fossils on exhibit.
"This one," he says, "Is 6 million and 2 years old."
"Wow," says a patron, "How do you know the age so accurately?"
"Well," says the guide, "It was 6 million years old when I started here 2 years ago."

Cool, you posted the original with the Tim Minchin callout.

The approach requires multiple base stations, each in the path of a ray which is detected at both the station and receiver, and the receiver's position can only be known if there is communication with the stations.