What does FIRB stand for?
FIRB stands for "Flight Information Region Boundary"
How to abbreviate "Flight Information Region Boundary"?
"Flight Information Region Boundary" can be abbreviated as FIRB
What is the meaning of FIRB abbreviation?
The meaning of FIRB abbreviation is "Flight Information Region Boundary"
What does FIRB mean?
FIRB as abbreviation means "Flight Information Region Boundary"
