SOS, XXX, and TTT

Last season while watching Deadliest Catch on Discover Channel, several times I heard the distress call "PON PON". Doing a little research (errr... a Google search) I learned that there are several distress signals beyond the venerable and familiar MAYDAY or SOS:

Distress signal: "MAYDAY" (CW: SOS)
Urgency signal: "PAN PAN" (CW: XXX)
Safety signal: "SECURITE" (CW: TTT)

I'm curious why we don't discuss or support the usage of PAN PAN (XXX) and SECURITE (TTT) in amateur radio?
Anthony Good, K3NG, is a regular contributor to AmateurRadio.com and writes from Pennsylvania, USA. Contact him at [email protected].

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