Final answer:
RNAV Lines of Minima are found in the chart header of an RNAV approach chart, providing critical minimum altitude information for pilots to ensure a safe approach and landing.
Step-by-step explanation:
The chart header contains key information such as the minimum altitudes for various segments of the approach, decision altitude (DA), missed approach instructions, and the minima for different categories of aircraft. The RNAV lines of minima provide pilots with the lowest altitude or height above the touchdown zone to which descent is authorized based on signal reception, prescribed visibility, and other factors necessary for the particular type of approach being flown. Pilots must refer to these minima to ensure a safe approach and landing.