Definition
GSIA refers to the Ground Service International Authorization paragraph within an air carrier's Operations Specifications (OpSpecs). It is the FAA-issued authorization that permits a certificate holder to conduct specific ground service activities at international locations, defining the scope, limitations, and conditions under which those services may be performed outside the United States.
Plain English
GSIA is the official permission slip in an airline's FAA paperwork that says what ground-handling activities the company is allowed to do at airports outside the U.S., and under what conditions.
Context Anchor
Seen on instrument approach chart profile views and in operations specifications that describe how an approach is flown.
Why Pilots Care
Tells the pilot the correct altitude to capture the glide slope, ensuring a stable descent and avoiding false glideslope signals.
Intuition Check
GSIA is not a landing minimum. It is the altitude for joining the descent path, not the altitude where you decide whether to land.
Example Sentence 1
Before adding the new European destination, the carrier had to update its GSIA authorization in OpSpecs to cover ground handling at that airport.
Example Sentence 2
Intercept the glide slope at or above the GSIA to remain on the proper approach path.