[Capitán Trucho]

Originalmente publicado por KIAI

Adjunto link a la wikipedia inglesa: http://en.wikipedia.org/wiki/Pan-pan justamente con ejemplos nauticos y aeronauticos.
Leetelo detenidamente por favor.

Un saludo muy repetuoso y unas

¡¡YATÁ!!

Pan-pan
From Wikipedia, the free encyclopedia
For the Hindu Kingdom, see Pan Pan. For the French armoured car, see Panhard 178.
In radiotelephone communications, a call of pan-pan[1] (pronounced /ˈpæn ˈpæn/) is used to signify that there is an urgency on board a boat, ship, aircraft or other vehicle but that, for the time being at least, there is no immediate danger to the vessel itself.[2] This is referred to as a state of urgency. This is distinct from a Mayday call, which means that there is imminent danger to the continued viability of the vessel itself.[3] Thus "pan-pan" informs potential rescuers (including emergency services and other craft in the area) that a safety problem exists whereas "Mayday" will call upon them to drop all other activities and immediately initiate a rescue attempt.

Ya lo he cambiado.
Por si no lo sabes la Wiky no es nada fiable. Cualquier indocumentado (Yo) puede entrar en el texto con Edit y poner le que quiera.
Como tu dices:
Paciencia y