Final answer:
Pressing the RAM MAN ON button deploys the Ram Air Turbine (RAT), a device used to generate emergency power for an aircraft during a loss of power. It provides hydraulic and/or electrical power to ensure the safety and functionality of critical systems on board.
Step-by-step explanation:
When you press the RAM MAN ON pushbutton (pb), typically found in an aircraft's cockpit, it refers to the Ram Air Turbine (RAT) Manual Deployment switch. Pressing this button would deploy the RAT, which is an emergency power device used when there is a loss of power onboard the aircraft. The RAT harnesses the airflow around the plane to drive a turbine connected to a hydraulic pump or electrical generator, providing emergency hydraulic power and/or electricity to vital systems such as flight controls and cockpit displays.
By pressing the RAM MAN ON switch, you initiate a last-resort mechanism designed to ensure aircraft safety in critical situations. It is part of an aircraft's emergency procedures and is a crucial aspect of the onboard systems. In the context of pilot training or aircraft engineering, understanding the function and operation of the RAM MAN ON switch is a core learning objective.