Final answer:
Pressing the AVIONICS COOL ORIDE switch activates the avionics cooling system in an aircraft.
Step-by-step explanation:
When you press the AVIONICS COOL ORIDE switch located on the Environmental Control Panel, it activates the avionics cooling system in an aircraft.
The AVIONICS COOL ORIDE switch is used to cool the avionics equipment, such as computers, navigation systems, and communication systems, on board an aircraft.
This switch helps prevent overheating of the avionics equipment, which is crucial for the safe operation of the aircraft.