Magellan himself couldn't have circumnavigated the Earth without it
"Oh hello. I'm Ferdinand Magellan, welcome aboard my ship. Sometimes when I go exploring I get lost. Luckily, I use the GPS with my own namesake to keep me on track. See, it shows that I've been stranded on the same road for the past two weeks because boats don't travel well on land. Anyway, I'm Ferdinand Magellan. Can I get a lift?"