What is the longest route you can sail in a straight line without hitting land?

What is the longest route you can sail in a straight line without hitting land?

Scotland to the Bering Strait

Karachi, Pakistan to the Kamchatka Peninsula, Russia

Delaware, U.S. to Algiers, Algeria

Tierra del Fuego, Argentina to South Island, New Zealand

Answer: The correct answer is Karachi, Pakistan to the Kamchatka Peninsula, Russia.