(b)
when used as information: “Since communication is difficult, every word, or group of words, in this message will be sent twice.” 

Fr: . Chaque mot deux fois .
world aeronautical chart An aeronautical chart (using a scale of 1:1 000 000) that provides a standard series of aeronautical charts covering land areas of the world at a size and scale convenient for navigation by moderate-speed aircraft. Topographic information includes cities and towns, principal roads, railroads, distinctive landmarks, drainage, and relief. Aeronautical information includes visual and radio aids to navigation, airports, airways, restricted areas, obstacles, and other pertinent data.
. abbreviation: WAC
Fr: carte aéronautique du monde
World Geodetic System 1984 The geodetic co-ordinate reference system used in international civil aviation that allows the user to mathematically describe (in degrees of latitude and longitude) any position on the earth’s surface. WGS-84 uses a global set of ground stations as references.
.
abbreviation: WGS-84

.
see also: North American Datum 1983 (NAD83)

Fr: Système géodésique mondial -1984
WP Abbreviation for: waypoint Fr: WP
WPT ICAO: Abbreviation for: waypoint (WP) Fr: WPT
WS Abbreviation for: wind shear Fr: WS
Z

Z Written abbreviation for: Co-Ordinated Universal Time . other written abbreviation: UTC
Fr: Z
zulu Spoken expression for: Co-Ordinated Universal Time . other spoken expression: universal Note: This expression is pronounced “ZOO loo.”
Fr: zulu
APPENDIX A
The terminology provided in the Glossary for Pilots and Air Traffic Services Personnel was taken from the following sources:
Aeronautics Act
AIP Canada (ICAO)
Air Traffic Control Manual of Operations (ATC MANOPS)
Air Traffic Management (ICAO Doc 4444) (PANS RAC). Formerly the Procedures for Air Navigation

Services – Rules of the Air and Air Traffic Services
Air Traffic Services Administration and Management Manual (ATSAMM)
Annexes 1 to 18 (ICAO)
Aviation Weather Services Standards and Criteria (NP 7411)
Canada Air Pilot (CAP)
Canada Flight Supplement (CFS)
Canada Transportation Act (CTA)
Canadian Airspace Review (CAR) Terminology Committee
Canadian Aviation Regulations (CARs)
Canadian Transportation Accident Investigation and Safety Board Act (CTAISB Act)
Criteria for the Development of Instrument Procedures (TP 308/GPH 209)
Definitions (ICAO Doc 9569)
Designated Airspace Handbook (DAH)
Electronics and Telecommunications Terminology Committee (CUTEL)