What does 4DD stand for?
4DD stands for "4 Dimensional Airspace Deconfliction"
How to abbreviate "4 Dimensional Airspace Deconfliction"?
"4 Dimensional Airspace Deconfliction" can be abbreviated as 4DD
What is the meaning of 4DD abbreviation?
The meaning of 4DD abbreviation is "4 Dimensional Airspace Deconfliction"
What does 4DD mean?
4DD as abbreviation means "4 Dimensional Airspace Deconfliction"
