ENR 1.7  Altimeter setting procedures

1.  Introduction

The altimeter setting procedures in use generally conform to those contained in ICAO Doc 8168.

Transition altitudes are given on the instrument approach charts and under AD 2.17.

QNH reports and temperature information for use are provided by automatic terminal information service (ATIS) and are available on request from the air traffic services units. QNH values are given in hectopascals.

2.  Basic altimeter setting procedures

2.1  The pilot shall maintain the cruising altitude or flight level of the aircraft, as the case may be, by reference to an altimeter that is set in accordance with the following: A pilot of an aircraft must maintain the cruising altitude or flight level of the aircraft by reference to an altimeter that is set in accordance with the followin:g

  1. when operating at or above the established transition altitude for that aerodrome, set altimeter to 1013.25hPa (760mmHg); when operating at or above 4500m (FL150), set altimeter to 1013.2hPa (760mm Hg;)

  2. when operating at or below the established transition level for that aerodrome, set altimeter to the aerodrome QNH and QFE altimeter setting; when operating at or below 3900m (13000ft), set altimeter to the appropriate aerodrome QNH setting or area QNH zone settin;g

  3. when operating between transition altitude and transition level, maintain altitude or flight level as authorised by ATC. when operating between 3900m (13000ft) and 4500m (FL150), set altimeter to the appropriate area QNH zone setting as advised by an ATC uni.t

2.2  The pilot shall maintain altimeter setting and flight level as advised by an ATC unit, when flight level is below the departure aerodrome transition altitude and shall set the altimeter to 1013.25hPa (760mmHg) after exits from the controlled area. A pilot of an aircraft that is ascending or descending must set the altimeter in accordance with the followin:g

  1. when ascending above 3900m (13000ft), set altimeter to 1013.2hPa (760mm Hg);

  2. when descending through 4500m (FL150), set altimeter to the appropriate area QNH zone setting or aerodrome QNH setting.

2.3 Unless otherwise authorised by ATC unit, pilot-in-command of an aircraft operating within the airspace of Mongolia under VFR and IFR shall not maintain level cruising flight in the at any level between transition altitude and transition layerlevel.

3.  Description of altimeter setting region

Not applicable.

4.  Procedures applicable to operators (including pilots)

4.1 Flight planning

The levels at which a flight is to be conducted shall be specified in a flight plan:

  1. in terms of flight levels if the flight is to be conducted at or above the transition level;

  2. in terms of altitudes if the flight is to be conducted in the vicinity of an aerodrome and at or below the transition altitude.

5.  Table of cruising levels

DIAGRAM OF FLIGHT LEVEL ALLOCATIONS

Note: ATC will issue the Flight Level clearance in meters. Pilot shall use the Mongolia RVSM FLAS Diagram to determine the corresponding flight level in feet. The aircraft shall be flown using the flight level in FEET. Pilots should be aware that due to the rounding differences, the metric readout of the onboard avionics will not necessarily correspond to the cleared Flight Level in meters however the difference will never be more than 30 meters.

180°-359°MAG000°-179°MAG

Flight Levels

Flight Levels

MFTMFT
15500509001490048900
14300469001370044900
1310043000  
  1250041100
12200401001190039100
11600381001130037100
11000361001070035100
10400341001010033100
980032100950031100
920030100890029100
    
840027600810026600
780025600750024600
720023600690022600
660021700630020700
600019700570018700
540017700510016700
480015700450014800
420013800390012800
360011800330010800
3000980027008900
2400790021006900
1800590015004900
120039009003000
MFTMFT

Note: The following vertical separation is required between all flights conducted in the airspace of Mongolia:

  1. 300m up to the flight level of 8400m.

  2. 500m between the flight levels 8400m and 8900m;

  3. 300m between the flight levels 8900m and 12500m;

  4. 600m above the flight level 12500m.