System of Measurement
The following units of measurement are used in accordance with ICAO Annex 5:
| Parameter | Unit | Abbreviation |
|---|---|---|
| Distance (horizontal) | Nautical Mile | NM |
| Distance (short/visibility) | Metre / Kilometre | m / km |
| Altitude / Elevation / Height | Feet | ft |
| Speed (horizontal) | Knot | kt |
| Speed (vertical) | Feet per minute | ft/min |
| Wind speed | Knot | kt |
| Atmospheric pressure | Hectopascal | hPa |
| Temperature | Degrees Celsius | °C |
| Wind direction | Degrees magnetic/true | °M / °T |
| Time | Coordinated Universal Time | UTC |
| Fuel quantity | Kilogram | kg |
Reference Datums
- Horizontal: World Geodetic System 1984 (WGS-84)
- Vertical: Mean Sea Level (MSL)
- Time: UTC (Coordinated Universal Time)
ICAO Standard Units (Annex 5)
| Quantity | Unit | Abbreviation |
|---|---|---|
| Distance (horizontal) | Nautical Mile | NM |
| Distance (short) | Metre | m |
| Altitude / Flight Level | Feet | ft |
| Runway Length | Metres | m |
| Speed (airspeed) | Knots | kt |
| Speed (ground/wind) | Knots | kt |
| Visibility (RVR) | Metres | m |
| Wind direction | Degrees Magnetic | °M |
| Temperature | Degrees Celsius | °C |
| Atmospheric Pressure | Hectopascals | hPa |
| Weight | Kilograms / Tonnes | kg / t |
| Time | Hours and Minutes (UTC) | UTC |