What type of emergency would prompt the use of the "Pan Pan" signal?

The "Pan Pan" signal is used to indicate an emergency that is urgent but not life-threatening. This signal communicates to other mariners and authorities that there is a situation that requires attention regarding the safety of a vessel or a person onboard, but it does not warrant the same immediate and extreme response as a "Mayday" call, which is reserved for grave and imminent danger.

In the context of maritime communications, distinguishing between the severity of emergencies is crucial for effective response. "Pan Pan" serves to alert others to potential dangers that could escalate if not addressed promptly, such as mechanical failures, requests for medical assistance that don't pose an immediate threat to life, or other situations where safety is a concern but does not constitute an emergency in the highest sense.

Using "Pan Pan" helps ensure resources are allocated appropriately. It conveys urgency while prioritizing potential emergency situations, thus allowing for better management of distress signals and responses at sea.