Final answer:
O2 masks can be manually deployed in the cabin for use during emergency situations such as a drop in cabin pressure.
Step-by-step explanation:
Yes, you can manually deploy the O2 mask in the cabin. O2 masks, also known as oxygen masks, are safety devices that provide oxygen to individuals in case of an emergency situation, such as a sudden drop in cabin pressure in an aircraft. When the cabin pressure decreases, the oxygen masks automatically drop from the compartments above the passenger seats. To use the mask, you simply pull the mask towards you and place it over your nose and mouth. The mask is equipped with an elastic band or straps that you can adjust to ensure a tight seal.