①
The signal implies that the ship is in imminent danger or requires immediate assistance.
②
The urgency signal may be addressed to all stations or to a specific station.
③
The urgency signal may be used when the master desires to issue a warning that circumstances may become necessary for him to send out a distress signal at a later stage.
④
The signal may be sent on the distress frequencies only on the authority of the person responsible for the vessel.
