When a vessel is in distress and requires assistance from other vessels or from the shore the following shall be the signals to be used or displayed by her, either together or separately, namely:

In the daytime -

(1) A. gun or other explosive signal fired at intervals of about a minute

(2) The International Code signal of distress indicated by N C.

(3) The distance signal, consisting of a square flag, having either above or below it a ball or anything resembling a ball.

(4) The distant signal, consisting of a cone, point upward, haying either above it or below it a ball or anything resembling a ball.

(5) A continuous sounding with any fog-signal apparatus.

At night -

(1) A gun or other explosive signal fired at intervals of about a minute.

(2) Flames on the vessel (as from a burning tar barrel, oil barrel, and so forth).

(3) Rockets or shells throwing stars of any color or description, fired one at a time, at short intervals.

(4) A continuous sounding with any fog-signal apparatus.