1.7.1 Introduction
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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.
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Transition altitudes for all aerodromes are given on the instrument approach charts.
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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.
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1.7.2 Basic altimeter setting procedures
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General
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1. The transition altitudes in the Curacao FIR are for operational purposes 2500 ft.
For St. Maarten and St. Eustatius the transition altitude in the Juliana TMA is
5000 ft.
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The following transition levels apply for the Airports in the Dutch Caribbean
territory:
Aeropuerto Hato FL 40
Beatrix Airport FL 40
Flamingo Airport FL 40
Princess Juliana Airport FL 65
F.D. Roosevelt Airport FL 65
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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 ascending.
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3. Flight level zero is located at the atmospheric pressure level of 1 013.2 hPa
(29.92 in). Consecutive flight levels are separated by a pressure interval
corresponding to 500 ft (152.4 m) in the standard atmosphere.
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Note.-
Examples of the relationship between flight levels and altimeter indications
are given in the following table, the metric equivalents being approximate:
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1.7.3 Take-off and climb
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A QNH altimeter setting is made available to aircraft in taxi clearance prior to takeoff.
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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.
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1.7.4 Vertical separation - en route
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Vertical separation during en-route flight shall be expressed in terms of flight levels at all times during an IFR flight and at night.
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IFR flights, and VFR flights above 900 m (3 000 ft), when in level cruising flight, shall be flown at such flight levels, corresponding to the magnetic tracks shown in the following table, so as to provide the required terrain clearance:
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Note.-
Some of the lower levels in the above table may not be usable due to terrain clearance requirements.
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1.7.5 Approach and landing
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1.7.5.1 QNH
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A QNH altimeter setting is made available in approach clearance and in clearance to enter the traffic circuit.
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1.7.5.2 QFE
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QFE altimeter settings are available (excluding Saba).
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1.7.5.1 Vertical positioning of aircraft during approach
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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.
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1.7.6 Missed approach
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The relevant portions of 2.1.2, 3 and 5 shall be applied in the event of a missed approach.
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1.7.7 Procedures applicable to operators (including pilots)
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Flight planning
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The levels at which a flight is to be conducted shall be specified in a flight plan
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a) in terms of flight levels if the flight is to be conducted at or above the transition level, and
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b) in terms of altitudes if the flight is to be conducted in the vicinity of an aerodrome
and at or below the transition altitude.
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Note 1.-
Short flights in the vicinity of an aerodrome may often be conducted only at altitudes below the transition altitude.
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Note 2.-
Flight levels are specified in a plan by number and not in terms of feet or metres as is the case with altitudes.
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1.7.8 Tables of cruising levels
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The cruising levels to be observed when so required are as follows:
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a) in areas where, on the basis of regional air navigation agreement and in accordance
with conditions specified therein, a vertical separation minimum (VSM) of 300 m
(1000 ft) is applied between FL 290 and FL 410 inclusive:*
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TRACK**
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From 000 degrees to 179 degrees
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From 180 degrees to 359 degrees
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IFR Flights
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VFR Flights
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IFR Flights
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VFR Flights
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Altitude
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Altitude
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Altitude
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Altitude
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FL
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Metres
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Feet
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FL
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Metres
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Feet
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FL
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Metres
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Feet
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FL
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Metres
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Feet
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-90
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0
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10
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300
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1 000
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20
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600
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2 000
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30
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900
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3 000
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35
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1 050
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3 500
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40
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1 200
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4 000
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45
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1 350
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4 500
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50
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1 500
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5 000
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55
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1 700
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5 500
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60
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1 850
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6 000
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65
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2 000
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6 500
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70
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2 150
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7 000
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75
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2 300
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7 500
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80
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2 450
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8 000
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85
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2 260
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8 500
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90
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2 750
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9 000
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95
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2 900
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9 500
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100
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3 050
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10 000
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105
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3 200
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10 500
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110
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3 350
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11 000
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115
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3 500
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11 500
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120
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3 650
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12 000
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125
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3 800
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12 500
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130
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3 950
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13 000
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135
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4 100
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13 500
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140
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4 250
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14 000
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145
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4 400
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14 500
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150
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4 550
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15 000
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155
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4 700
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15 500
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160
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4 900
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16 000
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165
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5 050
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16 500
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170
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5 200
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17 000
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175
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5 350
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17 500
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180
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5 500
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18 000
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185
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5 650
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18 500
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190
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5 800
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19 000
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195
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5 950
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19 500
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200
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6 100
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20 000
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TRACK**
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From 000 degrees to 179 degrees
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From 180 degrees to 359 degrees
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IFR Flights
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VFR Flights
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IFR Flights
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VFR Flights
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Altitude
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Altitude
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Altitude
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Altitude
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FL
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Metres
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Feet
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FL
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Metres
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Feet
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FL
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Metres
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Feet
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FL
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Metres
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Feet
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210
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6 400
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21 000
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220
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6 700
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22 000
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230
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7 000
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23 000
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240
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7 300
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24 000
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250
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7 600
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25 000
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260
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7 900
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26 000
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270
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8 250
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27 000
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280
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8 550
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28 000
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290
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8 850
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29 000
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300
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9 150
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30 000
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310
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9 450
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31 000
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320
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9 750
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32 000
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330
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10 050
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33 000
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340
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10 350
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34 000
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350
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10 650
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35 000
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360
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10 950
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36 000
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370
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11 300
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37 000
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380
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11 600
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38 000
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390
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11 900
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39 000
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400
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12 200
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40 000
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410
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12 500
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41 000
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430
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13 100
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43 000
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450
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13 700
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45 000
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470
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14 350
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47 000
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490
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14 950
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49 000
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510
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15 550
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51 000
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etc.
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etc.
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etc.
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etc.
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etc.
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etc.
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* Except when, on the basis of regional air navigation agreements, a modified table of cruising levels based on a nominal vertical
separation minimum of 300 m (1 000 ft) is prescribed for use, under specified conditions, by aircraft operating above FL 410 within
designated portions of the airspace.
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** Magnetic track, or in polar areas at latitudes higher than 70 degrees and within such extensions to those areas as may be prescribed
by the appropriate ATS authorities, grid tracks as determined by a network of lines parallel to the Greenwich Meridian superimposed
on a polar stereographic chart in which the direction towards the North Pole is employed as the Grid North
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b) in other areas:
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TRACK*
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From 000 degrees to 179 degrees
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From 180 degrees to 359 degrees
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IFR Flights
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VFR Flights
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IFR Flights
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VFR Flights
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Altitude
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Altitude
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Altitude
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Altitude
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FL
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Metres
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Feet
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FL
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Metres
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Feet
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FL
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Metres
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Feet
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FL
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Metres
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Feet
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-90
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0
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10
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300
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1 000
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20
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600
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2 000
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30
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900
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3 000
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35
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1 050
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3 500
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40
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1 200
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4 000
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45
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1 350
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4 500
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50
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1 500
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5 000
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55
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1 700
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5 500
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60
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1 850
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6 000
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65
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2 000
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6 500
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70
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2 150
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7 000
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75
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2 300
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7 500
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80
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2 450
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8 000
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85
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2 600
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8 500
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90
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2 750
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9 000
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95
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2 900
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9 500
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100
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3 050
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10 000
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105
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3 200
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10 500
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110
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3 350
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11 000
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115
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3 500
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11 500
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120
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3 650
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12 000
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125
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3 800
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12 500
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130
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3 950
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13 000
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135
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4 100
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13 500
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140
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4 250
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14 000
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145
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4 400
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14 500
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150
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4 550
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15 000
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155
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4 700
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15 500
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160
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4 900
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16 000
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165
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5 050
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16 500
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170
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5 200
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17 000
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175
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5 350
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17 500
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180
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5 500
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18 000
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185
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5 650
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18 500
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190
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5 800
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19 000
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195
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5 950
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19 500
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200
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6 100
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20 000
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210
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6 400
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21 000
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220
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6 700
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22 000
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230
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7 000
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23 000
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240
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7 300
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24 000
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250
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7 600
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25 000
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260
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7 900
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26 000
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270
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8 250
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27 000
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280
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8 550
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28 000
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TRACK*
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From 000 degrees to 179 degrees
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From 180 degrees to 359 degrees
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IFR Flights
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VFR Flights
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IFR Flights
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VFR Flights
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Altitude
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Altitude
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Altitude
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Altitude
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FL
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Metres
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Feet
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FL
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Metres
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Feet
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FL
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Metres
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Feet
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FL
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Metres
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Feet
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290
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8 850
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29 000
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310
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9 450
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31 000
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330
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10 050
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33 000
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350
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10 650
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35 000
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370
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11 300
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37 000
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390
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11 900
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39 000
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410
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12 500
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41 000
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430
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13 100
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43 000
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450
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13 700
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45 000
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470
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14 350
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47 000
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490
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14 950
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49 000
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510
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15 550
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51 000
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etc.
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etc.
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etc.
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etc.
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etc.
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etc.
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** Magnetic track, or in polar areas at latitudes higher than 70 degrees and within such extensions to those areas as may be
prescribed by the appropriate ATS authorities, grid tracks as determined by a network of lines parallel to the Greenwich Meridian
superimposed on a polar stereographic chart in which the direction towards the North Pole is employed as the Grid North.
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