ENR 1.7  Altimeter setting procedures

1  Introduction

The altimeter setting procedures in use generally conform to those contained in ICAO Doc 8168, Vol. I, Part 6 and are given in full below. Differences are shown in quotation marks.

QNH reports and temperature information for use in determining adequate terrain clearance are provided in MET broadcasts and are available on request from the air traffic services units. QNH values are given in hectopascals.

2  Basic altimeter setting procedures

2.1  General
2.1.1 A transition altitude is specified for each aerodrome.
2.1.2 Vertical positioning of aircraft when at or below the transition altitude is expressed in terms of altitude, whereas such positioning at or above the transition level is expressed in terms of flight levels. While passing through the transition layer, vertical positioning is expressed in terms of altitude when descending and in terms of flight levels when climbing.
2.1.3 Flight level zero is located at the atmospheric pressure level of 1 013.2 hPa (760 mm Hg).
The first consecutive flight level in an airspace in which responsibility for air traffic service rests with the ATC units of the Republic of Armenia is the flight level 3000 ft.

Note: Examples of the relationship between flight levels and altimeter indications are given in the following table, the metric equivalents being approximate:

Flight level number Altimeter indication
Feet Metres
101 000300
151 500450
202 000600
505 0001 500
10010 0003 050
15015 0004 550
20020 0006 100
2.2  Take-off and climb
2.2.1 A QNH altimeter setting is made available to aircraft in taxi clearance prior to take-off.
The QFE value will be given on request only.
2.2.2 Vertical positioning of aircraft during climb is expressed in terms of altitudes until reaching the transition altitude above which vertical positioning is expressed in terms of flight levels.
2.3  Vertical separation — en route
2.3.1 Vertical separation during en-route flight shall be expressed in terms of flight levels at all times “during an IFR flight and at night”.
2.3.2 Flights operating outside controlled airspace on an altitude lower then 11 500 ft MSL, the altitude measure is performed according QNH.
2.3.3 IFR/VFR flights, above 3000 ft, corresponding to the magnetic tracks shown in the following table, as it will provide the required terrain clearance:
000˚-179˚180˚-359˚
IFRVFRIFRVFR
Flight level number30354045
50556065
70758085
9095100105
..........etc...........etc.
270280
290300
310320
etc.etc.

Note: Some of the lower levels in the above table may not be usable due to terrain clearance requirements.

2.4  Approach and landing
2.4.1 A QNH altimeter setting is made available in approach clearance and in clearance to enter the traffic circuit.
2.4.2 QFE altimeter settings will be given on request only.
2.4.3 Vertical positioning of aircraft during approach is controlled by reference to flight levels until reaching the transition level below which vertical positioning is controlled by reference to altitudes.
2.5  Missed approach
2.5.1 The relevant portions of 2.1.2, 2.2 and 2.4 shall be applied in the event of a missed approach.

3  Description of altimeter setting region

NIL

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. The flight level on a route section in which responsibility for air traffic service rests with Armenia shall be expressed in the following manner in terms of flight level and is designated as F.
E.g.: F310 corresponds to the FL 310.

5  Tables of cruising levels

The cruising levels to be observed when so required are as follows:
MAGNETIC TRACK
From 000 degrees to 179 degreesFrom 180 degrees to 359 degrees
IFR FlightsVFR FlightsIFR FlightsVFR Flights
FLAltitudeFLAltitudeFLAltitudeFLAltitude
MetresFeetMetresFeetMetresFeetMetresFeet
309003 000351 0503 500401 2004 000451 3504 500
501 5005 000551 7005 500601 8506 000652 0006 500
702 1507 000752 3007 500802 4508 000852 6008 500
902 7509 000952 9009 5001003 05010 0001053 20010 500
1103 35011 0001153 50011 5001203 65012 0001253 80012 500
1303 95013 0001354 10013 5001404 25014 0001454 40014 500
1504 55015 0001554 70015 5001604 90016 0001655 05016 500
1705 20017 0001755 35017 5001805 50018 0001855 65018 500
1905 80019 0001955 95019 5002006 10020 000
2106 40021 0002206 70022 000
2307 00023 0002407 30024 000
2507 60025 0002607 90026 000
2708 25027 0002808 55028 000
2908 85029 0003009 15030 000
3109 450 31 0003209 75032 000
33010 05033 00034010 35034 000
35010 65035 00036010 95036 000
37011 30037 00038011 60038 000
39011 90039 00040012 20040 000
41012 50041 00043013 10043 000
45013 70045 00047014 35047 000
49014 95049 00051015 55051 000
etc.etc.etc.etc.etc.etc.