One minute of longitude along the equator is equal to how many nautical miles?

At the equator, one minute of longitude corresponds to one nautical mile. This is due to the definition of a nautical mile, which is based on the circumference of the Earth. The Earth is divided into degrees of latitude and longitude, with each degree further divided into 60 minutes.

Since one degree of latitude or longitude at the equator represents approximately 60 nautical miles, it follows that each minute of longitude—one-sixtieth of a degree—equals one nautical mile. This connection between degrees, minutes, and nautical miles is fundamental in navigation, making it a key concept for pilots, mariners, and air traffic controllers alike.