Plain English Meaning
A chart that lets you find the density altitude by lining up the temperature with the pressure altitude. It tells you how thin the air is acting today, even if your altimeter shows a different number.
Full Definition
A graphical tool used to determine density altitude by entering the current outside air temperature and pressure altitude. The chart converts these two values into the altitude at which the standard atmosphere would have the same air density, allowing the pilot to assess aircraft performance under non-standard conditions.
Context Anchor
Seen in performance planning, especially from a , hot, or heavily loaded .