Update aviation.csv

Data/Abbr/aviation.csv

@@ -243,6 +243,7 @@ EAVA,Estonian Aviation Academy
 ECAC,European Civil Aviation Conference
 ECP,Entry Control Point
 EFM,Gesellschaft für Enteisen und Flugzeugschleppen
+EICAS,Engine Instrument Crew Alerting System
 ELEV,Field Elevation
 ELT,Emergency Locator Transmitter
 EOL,Engine-off landing
@@ -318,6 +319,7 @@ LOD,Level of Detail
 LTA,Lower Traffic Area
 LVNL,Luchtverkeersleiding Nederland (Air Traffic Control the Netherlands)
 LVP,Low Visibility Procedures
+LWINS,Lightweight Inertial Navigation System
 MA,Missed Approach (IFR)
 MATS,Malta Air Traffic Services
 MEA,Minimum En-route Altitude
@@ -330,6 +332,7 @@ MSL,Median Sea Level
 MSTA,Minimum Safe Turning Altitude
 MTOW,Maximum Take-Off Weight
 NATCA,National Air Traffic Controllers Association
+NATOPS,Naval Aviation Training and Operating Procedures Standardization
 NATS,National Air Traffic Services (UK)
 NAVAIDS,Navigational Aids
 NCOIC,Non-Commissioned Officer in Charge
@@ -474,7 +477,7 @@ TAWS,Terrain Avoidance and Warning System
 TCAS,Traffic alert and Collision Avoidance System
 TCDS,Type Certificate Data Sheet
 TCH,Threshold Crossing Height
-TCL,Taxi Center Lights
+TCL,Thrust Control Lever or Taxi Center Lights 
 TDW,Tower Display Workstation
 TDZ,Runway Touchdown Zone Lighting
 TDZE,Touch Down Zone Elevation
@@ -545,6 +548,7 @@ VOLMET,Meteorological Information for Aircraft in Flight
 VOR,VHF Omni-directional Receiver
 VORTAC,VOR -TACAN combination
 VREF,1.3 times the stalling speed of the aircraft in the stated landing configuration and at the prevailing aircraft weight
+VRS,Vortex Ring State
 VS,"Stall speed, defined as the minimum steady flight speed at which the airplane is controllable"
 VSBY,Visibility
 VSP,Vertical Speed