HAT

HAT. See height above touchdown elevation.
Hazardous attitudes. Five aeronautical decision-making attitudes that may contribute to poor pilot judgment: antiauthority, impulsivity, invulnerability, machismo, and resignation.

HAT-
(See HEIGHT ABOVE TOUCHDOWN.)
HAVE NUMBERS- Used by pilots to inform ATC that they have received runway, wind, and altimeter information only.

HAT
Height Above Touchdown zone - The height in feet of the Decision Height (DH) or Minimum Descent Altitude (MDA) above the TouchDown Zone Elevation (TDZE).
HIGH ...

This is the safe bet with DH 200' HAT, lights and 1/2 visibility
Precision with obstacles inside DH
DH 250 or higher, 1 mile visibility, may have lights. Over 250 DH means obstacles inside DH.
Non-precision ...

Height Above Touchdown Elevation (HAT)
HELI
Helicopter (ICAO Definition) ...