U
U.S. United States
UAS unmanned aerial system
UFC Unified Facilities Criteria
UPRR Union Pacific Railroad
USAHAS U.S. Avian Hazard Advisory System
USC United States Code
USFWS U.S. Fish and Wildlife Service
UTES Unit Training Equipment Site
UXO unexploded ordnance
V
VFR Visual Flight Rules
VIIRS Visible Imaging Infrared Radiometer Suite
VO Vertical Obstructions
W
WAATS Western Army Aviation Training Site
WQQ Water Quality / Quantity
Background Report
A-9