Section 59 in The Naval Ceremonial, Conditions Of Service And Miscellaneous Regulations, 1964
59. Senior Officers Present Afloat.
(a)When two or more of Indian Naval Ships are present in a port or roadstead, the starboard pendant may be hoisted at the starboard yardarm of the Senior Officer's ship as a distinguishing flag in addition to the masthead pendant, provided that the ship is not already flying a flag or broad pendant.(b)When Indian Naval Ships are in company with warships of other nations (including Commonwealth), the starboard pendant shall be flown by the Senior Indian Naval Officer present in the manner described above in addition to any flag or broad pendant.Section IX - Distinguishing Flags of other Authorities
