| http://www.w3.org/ns/prov#value | - In radiotelephone communications, a call of three repetitions of pan-pan[1] (play /??p????n ??p????n/)[2][3] 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 anyone's life or to the vessel itself
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