What does YAT stand for?

Attawapiskat - Canada - Airport symbol (OAG)

Yacht - NCIC boat type code (NCIC)

Yaldymych - Former USSR - Seismograph station code, US Geological Survey - Closed (SEIS)

Yambeta - Language code (ETLW)

Yates Manufacturing - NCIC boat manufacturer code (NCIC)

Yugoslavian Air Trnsport (BUAC)