Aviation Abbreviations Glossary

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Term Definition
Zpi
Indicated Pressure Altitude
Zp
Pressure Altitude
ZFW
Zero Fuel Weight
ZFCG
Zero Fuel Center of Gravity
ZC
Zone Controller
Z
Zone
Z
Greenwich Mean Time
YTPPP
Yearly Technical Publications Processing Planning
YES
Yankee Escape System
YE
Year
YCR
Economy Class-Rear
YCL
Economy Class Front
YCF
Economy Class-Front
YC
Tourist Class
Y/C
Economy Class
Y
Yellow
XWIND
Crosswind
XTK
Cross Track Deviation
XTK
Cross Track Error
XTK
Cross Track Distance
XTAL
Crystal
XT
Reception (Transponder to TCAS)
XSEC
Extra Section
XREF
Crossreference
XPNDR
Transponder