How do you convert feet per nautical mile (FT/NM) to feet per minute (FT/MIN)?

To convert feet per nautical mile (FT/NM) to feet per minute (FT/MIN), it is essential to consider both the rate of travel—in nautical miles per hour (NM/HR)—and the distance measurement in nautical miles. The conversion relies on the relationship between these units.

When calculating this, you start with FT/NM, which indicates how many feet are covered for each nautical mile traveled. In the correct approach, you multiply FT/NM by the ground speed in nautical miles per hour. This gives you the total feet traveled in one hour. Since speed is measured in hours, it is crucial to keep the time reciprocal to the speed when doing the conversion.

The calculation involves standardizing these units correctly. By using the formula FT/NM multiplied by Ground Speed (in NM/HR), you determine how many feet are covered during the time it takes to travel one nautical mile at a given speed. The denominator of 1 hour allows you to convert the measurement directly into feet per minute.

This method effectively translates the distance covered into a time rate, allowing the conversion to feet per minute, which is a necessary measure for various aviation applications. The other options do not accurately incorporate the conversion of speed into the calculation or misuse time factor