Final answer:
The bottom of the yellow arc on the ASI represents Vno - Maximum cruise speed beginning of caution range.
Step-by-step explanation:
The bottom of the yellow arc on the Airspeed Indicator (ASI) represents Vno - Maximum cruise speed beginning of caution range.
Vno refers to the maximum structural cruising speed of an aircraft, which should not be exceeded in normal operations. The yellow arc on the ASI indicates the range of speeds where caution should be exercised. Going beyond this range may cause potential damage or stress to the aircraft.
For example, if an aircraft is flying within the yellow arc on the ASI, the pilot needs to be cautious and avoid operating the aircraft at speeds approaching the maximum limit of the yellow arc.