GEN 2 TABLES AND CODES

GEN 2.1 MEASURING SYSTEM, AIRCRAFT MARKINGS, HOLIDAYS

1 Units of Measurement

The table of units of measurement shown below will be used by aeronautical stations within Ha Noi and Ho Chi Minh FIRs for air and ground operation.
For measurement of
Units used
Distance used in navigation, position reporting, etc...
Kilometres or Nautical miles
Relatively short distances such as those relating to aerodromes (e.g. Runway lengths)
Metres
Altitudes, elevations and heights
Metres or feet
Horizontal speed including wind speed
Metre per second or metre per knots
Vertical speed
Metre per second
Wind direction for landing and taking-off
Degrees Magnetic
Wind direction (except for landing and taking-off)
Degrees true
Visibility including runway visual range
Kilometres or metres
Altimeter setting
Hectopascal
Temperature
Degrees Celsius
Weight
Metric tonnes or kilograms
Time
Hours and minutes, beginning at midnight UTC

2 Time System

Co-ordinated Universal Time (UTC) is used by air navigation services and in publications issued by the Aeronautical Information Service. Reporting of time is expressed to the nearest minute e.g. 12:40:35 is reported as 1241. Local time in Viet Nam is 7 hours ahead of UTC. Time checks to aircraft are accurate within 30 seconds.

3 Geodetic Reference Datum

3.1 Name/designation of datum
All published geographical co-ordinates indicating latitude and longitude are expressed in terms of the World Geodetic System - 1984 (WGS-84) geodetic reference datum.
3.2 Area of Application
The area of application for the published geographical co-ordinates coincides with the area of responsibility of the Aeronautical Information Service, i.e. the entire territory of Viet Nam as well as the airspace over the seas encompassed by Ha Noi and Ho Chi Minh flight information regions.
3.3 Use of an asterisk to identify published geographical co-ordinates
An asterisk (*) will be used to identify those published geographical co-ordinates which have been transformed into WGS-84 co-ordinates but the accuracy of their original work does not meet the requirements in ICAO Annex 11, Chapter 2 and ICAO Annex 14, Volume I and II, Chapter 2. Specifications for determination and reporting of WGS-84 co-ordinates are given in ICAO Annex 11, Chapter 2 and ICAO Annex 14, Volume I and II, Chapter 2.

4 Aircraft Nationality and Registration Marks

The nationality mark for aircraft registered in Viet Nam consits of the letters ‘VN’, followed by a hyphen and a registration mark consisting of three numerical letters. E.g: VN - 320.

5 Public holidays

Name
Day/ Month
New Year's Day
01January
Lunar New Year (4 days Lunar calendar)
30 December, 1, 2 and 3 January (Lunar calendar)
Viet Nam's National Liberation Day
30 April
International Labour Day
01 May
Viet Nam's National Day
2 September
Feast of Hung King 's mourning
10 March (Lunar calendar)