The two became friends. John Henslow suggested that Charles Darwin take the unpaid position of naturalist for a trip on the British ship H.M.S.Beagle.

VOA: special.2009.02.25

A navigator would take the last known position of the ship, then add the ship's speed.

VOA: special.2009.12.23

For Eleanor Creesy to learn the correct position of the ship each day, she had to be able to see the sun, the moon or stars.

VOA: special.2009.12.23

Would I really leave my position as editor of Engadget to try my hand at plugging the holes in Moto's sinking ship?

ENGADGET: Motorola's cellphone business needs a new leader: okay, I'm in.

The weak signal can cause a ship's instruments to gradually drift out of true, without setting off any alarms, leaving the ship in a different position to where it "thinks" it is.

BBC: Navigational backup to aid ships in Dover straits

The Foreign Affairs Select Committee, which has recommended that that the government should review how it handles the kidnap of British nationals abroad, said there was limited guidance on the use of lethal force against pirates trying to ambush vessels, and that ship captains were left in a difficult position trying to decide what action to take.

BBC: Kidnap couple call for changes to piracy defence laws