Lost at Sea: The Search for Longitude

"So, surely, it's...

C.) ...Tashkent, Uzbekistan!" (longitude: about 70 degrees east)
Tashkent is indeed four hours and forty minutes removed from Greenwich - but can you say "land-locked?"

So, by your powers of deductive reasoning, you find yourself to actually be at...

D.) ...Cape Cod! (longitude: about 70 degrees west)
Greenwich lies about 70 degrees east of Cape Cod. If the Earth rotates from west to east at 15 degrees per hour, it's high noon on the Cape about four hours and forty minutes later than in Greenwich.

See if you can navigate your way to the correct answer in next week's NOVA Challenge.