Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym HIWAS is...

HIWAS is

  • Hazardous Inflight Weather Advisory Service

HIWAS is also in:

Acronym Definition Searched: LV PEDES WOH WLTI 11769 SD ICARS WHX PB ABV W05AX IMTO HRC GAP QZC LD