flag of distress

A distress signal, also known as a distress call, is an internationally recognized means for obtaining help. Distress signals are communicated by transmitting radio signals, displaying a visually observable item or illumination, or making a sound audible from a distance. A distress signal indicates that a person or group of people, ship, aircraft, or other vehicle is threatened by serious and/or imminent danger and requires immediate assistance.[1]:PCG D−3 Use of distress signals in other circumstances may be against local or international law. An urgency signal is available to request assistance in less critical situations. In order for distress signalling to be the most effective, two parameters must be communicated: Alert or notification of a distress in progress Position or location (or localization or pinpointing) of the party in distress. For example, a single aerial flare alerts observers to the existence of a vessel in distress somewhere in the general direction of the flare sighting on the