The following signals, used or exhibited either together or separately, indicate distress and need of assistance:

1. (a) A gun or other explosive signal fired at intervals of about a minute;
2. (b) A continuous sounding with any fog-signaling apparatus;
3. (c) Rockets or shells, throwing red stars fired one at a time at short intervals;
4. (d) A signal made by any method consisting of the group . . . - - - . . .
5. (SOS) in the Morse Code;
6. (e) A signal sent by radiotelephony consisting of the spoken word “Mayday”;
7. (f) The International Code Signal of distress indicated by N.C.;
8. (g) A signal consisting of a square flag having above or below it a ball or anything resembling a ball;
9. (h) Flames on the vessel (as from a burning tar barrel, oil barrel, etc.);
10. (i) A rocket parachute flare or a hand flare showing a red light;
11. (j) A smoke signal giving off orange-colored smoke;
12. (k) Slowly and repeatedly raising and lowering arms outstretched to each side;

13. (l) A distress alert by means of digital selective calling (DSC) transmitted on:

    1. (i) VHF channel 70, or
    2. (ii) MF/HF on the frequencies 2187.5 kHz, 8414.5 kHz, 4207.5 kHz, 6312 kHz, 12577 kHz or 16804.5 kHz;
14. (m) A ship-to-shore distress alert transmitted by the ship's Inmarsat or other mobile satellite service provider ship earth station;
15. (n) Signals transmitted by emergency position-indicating radio beacons;
16. (o) Signals transmitted by radiocommunication systems, including survival craft radar transponders meeting the requirements of 47 CFR 80.1095; and
17. (p) A high intensity white light flashing at regular intervals from 50 to 70 times per minute.