What is the proper preflight for the POB on the EMB?

The proper preflight procedure for the Portable Oxygen Bottle (POB) on the EMB emphasizes ensuring that the mask is attached and the tubing is in good condition. This is vital for safety reasons. The oxygen system relies on effective delivery of oxygen to passengers or crew members who may require supplemental oxygen during flight. Should an emergency arise where oxygen is needed, it is crucial that the mask is securely connected to the bottle and that the tubing is intact without any leaks or damages. This ensures that the oxygen can be effectively administered when needed.

In this context, while locating the POB in the overhead compartment is important for accessibility, it does not directly relate to the operational state of the equipment itself. Confirming the weight of the device and checking visual markings for visibility are also relevant tasks but do not necessarily guarantee the functionality of the oxygen delivery system, which is the critical aspect of the preflight check for the POB. Thus, ensuring that the mask and tubing are in proper condition is the most important step in preparing for any situation that may require oxygen.