What are the top three priority transmissions in order?

In maritime communications, the order of priority for transmissions is essential for ensuring safety at sea. The correct order starts with distress communications, indicated by "Mayday," which is the highest priority and is used when a vessel is in grave and immediate danger and requires rescue.

Following this, "Pan Pan" denotes urgency transmissions. This is used when there is a situation that requires attention but does not constitute a distress situation, such as a vessel that has lost engine power but is not in immediate danger.

The third tier is "securite," which pertains to safety messages that contain important navigational information, warnings, or updates that all mariners should be aware of, but that do not relate to a specific emergency or urgent need for assistance.

This order reflects the urgency and severity of the situations being communicated, ensuring that those in immediate danger receive the assistance they need as quickly as possible, while still allowing for the communication of important information to all vessels in the vicinity.