PAN-PAN is used more often than you might think, at least outside the US. In particular, any medical emergency would be a PAN-PAN. Here's an interesting exampl

PAN-PAN is used more often than you might think, at least outside the US. In particular, any medical emergency would be a PAN-PAN. Here's an interesting example where two aircraft had declared PAN-PAN for quite different reasons, while coming into Sydney. https://www.youtube.com/watch?v=DfidHywKmZI https://www.youtube.com/watch?v=DfidHywKmZI