What is required during the preflight for the Portable Oxygen Bottles (POB)?

The requirement for Portable Oxygen Bottles (POB) during the preflight checks involves ensuring safety and readiness for emergency situations. The correct answer involves the presence of two oxygen masks, which allows sufficient oxygen delivery capability for two individuals if the need arises. Additionally, the gauge must read 1500 psi or greater, which indicates that the bottle is adequately filled and ready for use.

Having a gauge reading of 1500 psi or above is essential because it ensures that the oxygen supply is sufficient in case of an emergency requiring supplemental oxygen. The presence of two masks guarantees that both the cabin crew and passengers can be properly equipped to handle situations such as depressurization or other emergencies that may necessitate the use of supplemental oxygen.

This comprehensive approach to checking both the quantity of oxygen (through the gauge) and the availability of adequate delivery devices (the masks) reflects standard safety protocols in aviation and ensures preparedness in critical situations.