The distance equivalent of one degree of latitude along the same line of longitude is:

One degree of latitude is consistently recognized as being approximately equal to 60 nautical miles. This is based on the geometry of the Earth, which is divided into 360 degrees of latitude. Since the Earth is approximately a sphere, the circumference of the Earth in nautical miles can be derived from its polar measurements. Given that there are 60 minutes in a degree and that one minute of latitude is defined as one nautical mile, the calculation yields 60 nautical miles for each degree of latitude.

This measurement is crucial in navigation, as it provides a reliable method for mariners and aviators to determine their position based on latitude. As one moves along the same line of longitude, the distance associated with latitude remains constant, making this 60 nautical miles universally applicable for practical navigation purposes. This uniformity contrasts with the varying distances represented by degrees of longitude, which change depending on the latitude.