| FOR MEASUREMENT OF | UNITS USED |
|
Distance
used in navigation, position reporting, etc.
| Nautical Miles and Tenths (NM) |
|
Relatively short
distances
such as those relating to aerodromes (e.g., runway lengths)
| Metres (m) |
| Altitudes, elevations and heights | Feet (ft) / Metres (m) |
|
Horizontal
speed
including
wind speed
| Knots (kts) |
| Vertical speed | Feet per Minute (feet/ min) |
|
Wind
direction
for landing and taking off
| DEG/MAG (° M) |
|
Wind direction
except for landing and taking off
| DEG/TRUE (° T) |
|
Visibility
including
runway visual
range
| Kilometres or Metres (km/m) or (m) |
|
Altimeter
setting
, atmospheric pressure
| Hectopascal (hPa) |
| Temperature | Degrees Celcius (° C) |
| Weight | Metric tons or Kilograms (to/kgs) |
| Time | Hours & Minutes, the Day of
twenty-four (24) hours begins at midnight UTC |
| |
| |
| |
| 2.
TIME SYSTEM |
| Coordinated
Universal Time (UTC) is used by air navigation services and in all publications
issued by the Aeronautical Information Service. |
| Reporting of time
is expressed to the nearest minute, |
- from 00 to 29 seconds inclusive, the present minute;
- from 30 to 59 seconds inclusive, the following minute.
|
| e.g. 12 hours 40
min 40 sec is reported as 1241. Time checks to aircraft are accurate to within 5
seconds unless otherwise notified. |
| |
| 3.
GEODETIC REFERENCE DATUM |
| Name/Designation of Datum |
| All published
geographical coordinates indicat-ing latitude and longitude are expressed in terms
of the World Geodetic System 1984 (WGS 84) geodetic reference datum. |
| Geographical positions are normally given to an accuracy of
maximum resolution (4 decimals) for facilities located on the aerodrome. |
| Example : |
ARP
N 13°20'33.0821"
W 016°39'28.1307" or
132033.0821
W 0163928.1307
|
| |