Re: 'precision docking of oil tankers, as well as navigation'
What's 'precision docking of oil tankers' if it isn't navigation?!
Okay technically it's pilotage but it's pretty much the same thing.
As an aside I've seen it used to synchronise frequency hopping radios and the operator was completly unaware the numbers on the display had anything to do with the geographic position. Still it was handy to know his phone number for when there was an exercise fire on the bridge and we had to navigate from the upper deck.