What action is taken in a situation of suspected decompresson?

In a situation of suspected decompression, deploying oxygen masks immediately is crucial because it addresses the immediate need for supplemental oxygen for passengers and crew who may be experiencing hypoxia due to a sudden decrease in cabin pressure. When decompression occurs, the atmospheric pressure inside the cabin drops, and the amount of oxygen available becomes insufficient for normal breathing.

Therefore, deploying the oxygen masks activates the emergency oxygen supply and ensures that everyone can breathe adequately until the situation is stabilized or the aircraft descends to a safer altitude where atmospheric pressure is sufficient to breathe without supplemental oxygen.

While notifying the captain, conducting a cabin check, and increasing cabin pressure are all important actions in emergency protocols, they do not provide the immediate relief that deploying oxygen masks offers. Adequate oxygen supply is the priority in such emergency situations to manage the immediate health risks associated with decompression.