For a lightweight portable oxygen bottle, what is the duration of oxygen availability at the high outlet?

The duration of oxygen availability for a lightweight portable oxygen bottle at the high outlet is indeed 64 minutes. This figure refers to the operational capability of the portable oxygen system when delivering oxygen at a higher flow rate, which is generally required in emergency situations where passengers or crew may need immediate supplemental oxygen.

When oxygen is delivered at a higher outlet setting, the consumption rate is significantly greater than at lower settings, thus impacting the total time the oxygen supply can last. The design and testing of these systems ensure that they provide an adequate amount of oxygen for a reasonable duration under high demand, hence the specific duration of 64 minutes is standardized for quick reference in both training and emergency protocols.

This understanding is crucial for flight attendants as they must manage these resources effectively during flight operations, particularly in emergency scenarios that may necessitate the rapid use of portable oxygen.