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provided.
20.4.3 The display shall be capable of accepting updates
to authorized data entered manually with simple means for
verification prior to final acceptance of the data. Updates
entered manually shall be distinguishable on the display from
authorized data and its authorized updates and shall not affect
display legibility.
20.4.4 A record shall be kept of all updates, including
date and time of application.
20.4.5 The display shall allow the flight crew to display
updates so that the flight crew may review the contents of the
updates and determine that they have been included in the
syslem.
20.5 Performance tests, malfunction alarms
and indications
20.5.1 A means shall be provided for carrying out onboard
tests of major functions. In case of a failure, the test
shall display information to indicate which part of the system
is at fault.
20.5.2 A suitable alarm or indication of system
malfunction shall be provided.
20.6 Back-up arrangements
To ensure safe navigation in case of a failure of the Electronic
Aeronautical Chart Display - ICAO, the provision of
adequate back-up arrangements shall include:
a) facilities enabling a safe takeover of display functions in
order to ensure that a failure does not result in a critical
situation: and
b) a back-up arrangement facilitating the means for s&
navigation of the remaining part of the flight.
Note.- A suitable back-up system may include the carriage
of paper charts.
APPENDIX 1. MARGINAL NOTE LAYOUT
The unit of measurement used to express elevation Designation or title of the chart series
Date of aemnaut~ca~l nfonation
5
Name and location of producing organizat~on
- - -- - --
! Number and name of the chart :
......
ANNEX 4 APP 1-1
APPENDIX 2. ICAO CHART SYMBOLS
Index No. Index No.
Abandoned canal
Advisory airspace - ADA
Advisory route - ADR
Aerodromes
Abandoned or closed
Civil, land
Civil, water
Data in abbreviated form
Emergency, or with no facilities
For Approach Charts
For use on charts on which aerodrome
classification is not required
Joint civil and military, land
Joint civil and military, water
Military, land
Military, water
Runway pattern in lieu of aerodrome symbol
Runway (profile on electronic charts)
Aerodrome/Heliport Charts
Aerodrome Obstacle Charts
Building
Clearway - CWY
Escarpment
Pole, tower, spire, antenna
Railmad
Stopway - SWY
Terrain penetrating obstacle plane
Transmission line or overhead cable
Tree or shrub
Aerodrome reference point - ARP (on
Aerodrome/Heliport Charts)
Aerodrome traffic zone - ATZ
Aeronautical ground light
Air defence identification zone - ADIZ
Air Traffic Services - ATS
Airspace classifications
Airspace restrictions
Airway - AWY
Antenna (on Aerodrome Obstacle Charts)
Approximate contours
Areas not surveyed for contour information
ATSMET reporting point - MRP
(compulsory, on request)
Basic radio navigation aid
Bluff
Boundaries (international)
Boundaries, other
Building (on Aerodrome Obstacle Charts)
Buildings
Built-up areas
Canal
Change-over point - COP
Charted isolated rock
Church
City or large town
Clearway - CWY (on Aerodrome
Obstacle Charts) 165
Cliff 4
Coast guard station 73
Collocated VOR and DME radio navigation aids -
VORIDME 103,110
Collocated VOR and TACAN radio navigation
aids - VORTAC 107,110
Compass rose 110
Contours 1
Control area - CTA 113
Control zone - CTR 116
Controlled route 113
Coral reefs and ledges 22
Culture 47-83
Culture, miscellaneous 63-83
Dam 67
Danger area 127
Danger line 43
Distance measuring equipment - DME 102.1 10,173.174
DME distance 161
Dry lake bed 39
Dual highway 57
Electronic chart symbols 100,101,103,107,108,140,166-174
Escarpment 4
Escarpment (on Aerodrome Obstacle Charts) 163
Esker 9
Falls 28
Fence 65
Ferry 68
Flight information region - FIR 11 1
Forest ranger station 76
Fort 79
Gas field 70
Glaciers 42
Gravel 8
Hard surface runway (on Aerodrome/Heliport Charts) 142
Holding pattern (on electronic charts) 167
Helicopter alighting area on an aerodrome
(on Aerodrome/Heliport Charts) 146
Heliport 94
Highest elevation on chart 12
Highways 57-62
HY drogra~h~ 19-46
Ice cap 42
lnstrurnent landing system - ILS 108
International boundary closed to passage of aircraft
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