Sandel HeliTAWS ST3400H Pilot's Manual page 67

ILS Instrument Landing System
IMC Instrument Meteorological Conditions
KTS Knots
MINS Minimums
NCAT Negative Climb after Take-off
NVIS Night Vision
NM Nautical Miles
POST Power-On Self-Test
RA Resolution Advisory
RFMS Rotorcraft Flight Manual Supplement
RTCA Radio Technical Commission on Aeronautics (rtca.org)
TA Traffic Advisory
TAS Traffic Advisory System
TFC Traffic
TRK Aircraft's ground track (usually magnetic)
TSO Technical Standard Order
VMC Visual Meteorological Conditions
USB Universal Serial Bus
82046-PG-B1 ST3400H PILOT'S GUIDE Page 16-2