Altitude Types
- Indicated altitude
- Read directly off the altimeter, after it is set to a correct altimeter
setting
- Pressure altitude
- Read directly off the altimeter when it is set to 29.92" Hg
- Density altitude
- Pressure altitude corrected for nonstandard temperature variation
- Said another way, it is the height of the aircraft in standard atmosphere
based on the current temperature and pressure conditions
- True altitude
- True altitude is the vertical distance above mean sea level (MSL)
- Absolute altitude
- The vertical distance above the terrain