What does the "pan-pan" call signify?

The "pan-pan" call is used to convey urgent information that is not a distress situation but requires attention, such as when a boat is drifting or needs assistance due to a mechanical issue. It signifies a situation where assistance or advice is needed but does not indicate an immediate threat to life or vessel, which distinguishes it from a distress signal. This type of call helps ensure that emergency services know the difference between urgent situations that need prompt response and those that require immediate rescue measures.