Rules and Procedures - Measurement
Units of measurement used in all air and ground operations are as listed in the following table.

MEASUREMENT OF UNIT
Distance used in navigation, position reporting Kilometers
Relatively short distances such as those relating to aerodromes Kilometers and Meters
Elevations and heights Meters
Horizontal speed including wind speed Kilometers per Hour, Meters per Second
Vertical speed Meters per Second
Wind direction for landing and taking off Degrees True
Visibility Kilometers or Meters
Runway visual range Meters
Altimeter setting Millimeters Hg, Millibars (Hectopascals)
Temperature Degrees Celsius
Weight Metric Tons or Kilograms
Time Hours and Minutes, the day of 24hrs beginning at midnight UTC
WGS-84 IMPLEMENTATION STATUS

The National Geodetic System - 1990 (PZ-90) is used in the Russian Federation as geodetic reference datum. Geodetic System - 1942 (SK-42) is used until carrying out the accurate geodetic survey according to the coordinate system PZ-90.

The State Geocentric Coordinate System PZ-90.02 is practically identical to the World Geodetic System WGS-84.