What does OIS stand for?

OIS stands for "Obstruction Identification Surfaces"

How to abbreviate "Obstruction Identification Surfaces"?

"Obstruction Identification Surfaces" can be abbreviated as OIS

What is the meaning of OIS abbreviation?

The meaning of OIS abbreviation is "Obstruction Identification Surfaces"

What does OIS mean?

OIS as abbreviation means "Obstruction Identification Surfaces"