What does FLAT stand for?

Fellow Lady Astronaut Trainee

Flat - Commonly used (OPSA)

Flight-Aided Tracking (SAUS)

Flight Plan Aided Tracking - Aviation (IAA)

Flight-Plane-Aid Tracking (MCD)

Foreign Language Aptitude Test

Full Look at Turbulent Kinetic Energy (SAUS)

Katete - Zambia - ICAO location identifier (ICLI)