It was designed for three 9.2 inch Mark X BL guns .
In 1898 a further gun emplacement , the Citadel Battery , was built at the far end of the Western Outworks of the Citadel ( the westernmost extremity of the site ) .
Citadel was designed for three 9.2 inch Mark X BL guns .
In 1898 a further gun emplacement , the Citadel Battery , was built at the far end of the Western Outworks of the Citadel ( the westernmost extremity of the site ) .