Section 89: President of a Republic, Royal Personage, Flag Officer or Commodore, passing in Boat
Regulations for the Navy Part IIICentral Regulations · 1957
(1) When a President, or Royal personage is passing in a boat or tender, or when the Flag Officer, or Commodore as specified in Regulation 84, with his flag or broad pendant flying in a boat or tender, is passing a ship not under way, the guard and band shall be paraded, the bugles sounding, and the salute as laid down in Regulations 82 to 84 given, unless otherwise ordered.
(2) If a ship, not under way, is flying the flag or broad pendant of an officer senior to the Flag Officer or Commodore passing in a boat or tender, the “alert” shall be sounded on the bugle but guard and band shall not be paraded.
(3) When a Flag Officer, Commodore, or officer of equivalent rank, in uniform, is passing a ship not under way in a boat showing a Red or Blue disc as appropriate, the “alert” shall be sounded on the bugle.