Article 71 Flags and signalling equipment
Every vessel of 12 metres in length and over to which these Rules apply shall be provided with:—
(a)
a proper complement of flags and pennants for communication by the international code of signals when proceeding on a distant water voyage;
(b)
an efficient signalling lamp capable of being used both by day and by night and which shall be provided with a battery of sufficient capacity to operate the lamp continuously for not less than two hours.