5 Altitude Types Indicated Altitude. It’s simply what’s the altitude indicates when sent to the correct barometric pressure. True Altitude. The distance above mean sea level. (MSL) Absolute Altitude. That’s the height above ground level or terrain. (AGL) Pressure Altitude. This is what the altimeter reads when set to standard pressure, 29.92. Density Altitude. This is pressure altitude corrected for nonstandard temperature. #ifrtraining #studentpilot #cfi #aircraftowners #flighttraining #aviatio