Need of assistance.

§ 87.01 Need of assistance. The following signals, used or exhibited either together or separately, indicate distress and need of assistance: (a) A gun or other explosive signal fired at intervals of about a minute; (b) A continuous sounding with any fog-signaling apparatus; (c) Rockets or shells, throwing red stars fired one at a time at short intervals; (d) A signal made by any method consisting of the group . . . – – – . . . (SOS) in the Morse Code; (e) A signal sent by radiotelephony consisting of the spoken word “Mayday”; (f) The International Code Signal of distress indicated by N.C.; (g) A signal consisting of a square flag having above or below it a ball or anything resembling a ball; (h) Flames on the vessel (as from a burning tar barrel, oil barrel, etc.); (i) A rocket parachute flare or a hand flare showing a red light; (j) A smoke signal giving off orange-colored smoke; (k) Slowly and repeatedly raising and lowering arms outstretched to each side; (l) A distress alert by means of digital selective calling (DSC) transmitted on: (i) VHF channel 70, or (ii) MF/HF on the frequencies 2187.5 kHz, 8414.5 kHz, 4207.5 kHz, 6312 kHz, 12577 kHz or 16804.5 kHz; (m) A ship-to-shore distress alert transmitted by the ship's Inmarsat or other mobile satellite service provider ship earth station; (n) Signals transmitted by emergency position-indicating radio beacons; (o) Signals transmitted by radiocommunication systems, including survival craft radar transponders meeting the requirements of 47 CFR 80.1095; and (p) A high intensity white light flashing at regular intervals from 50 to 70 times per minute.