For today's Geo Quiz, we're in the Atlantic, 52 degrees south of the equator.
British journalist Simon Winchester is hard at work on a new biography of the Atlantic Ocean. He's been sending us dispatches from his travels.
So where is he now? That's the question.
Winchester set sail a day and half ago, from Ushuaia, Argentina, a city which claims to be the southernmost in the world.
He travelled east, north-east on choppy seas, with a steady wind out of Cape Horn at his back.
That puts him exactly...well...where does it put him exactly?
