Contraction

Definition

Usage

Y

Yukon Standard Time (time groups only)

NWS

YCZ

yellow caution zone (runway lighting)

ICAO

YD

Yards

ICAO

YDA

Yesterday

GEN

YES

Yes (affirmative)

ICAO

YKN

Yukon

NWS

YL

approach light lane

ATC

YLSTN

Yellowstone

NWS

YMSG

your message

GEN

YMSGD

your message date

GEN

YR

Your

ICAO