This is what is used in TERPS. I presume PANS-OPS is the same:
Distances. Develop all distances in nautical miles (NM) (6076.11548 feet or 1852 meters per NM) and hundredths thereof, except where feet are required. Use the following formulas for feet and meter conversions:
feet = meters/0.3048 meters = feet x 0.3048