XV.[6] When sailing in a line of battle, one ship ahead of another, and I would have the ship who leads to alter her course and lead more to starboard, I will hoist a flag striped white and blue at the fore topmast-head, and fire a gun for every point of the compass I would have the course altered.
XVI.[6] And if I would have the ship that leads to alter her course and lead more to port, I will hoist a flag striped blue and white on the flagstaff at the mizen topmast-head, and fire a gun for every point of the compass I would have the course altered, and every ship in the squadron is to get into her wake as fast as possible.
XVII.[7] When I would have all the fireships to prime, I will hoist a chequered blue and yellow pennant at the mizen topmast-head.
*XVIII.[8] Notwithstanding the general printed Fighting Instructions, if at any time, when engaged with an equal number of the enemy's ships, and the ship opposed to any of his majesty's ships is forced out of the line, you are hereby required and directed to pursue her, and endeavour to take and destroy her.
_Memorandum_.--When the squadron is in a line of battle ahead, and the signal is made for the headmost and weathermost to tack, the ship that leads on the former tack is to continue to lead after tacking.[9]
*XIX.[10] When I would have the ship or ships that chase bring down their chase to me, I will hoist a blue flag pierced with white on the fore topgallant mast, not on the flagstaff.
*XX.[10] When I find it necessary to have the state and condition of the ships in the squadron sent on board me, I will make the signal for all lieutenants, and hoist a blue and white flag at the mizen peak and fire a gun. If for the state and condition of a particular ship, I make the signal for the lieutenant of that ship, with the flag at the mizen peak.
Given under my hand on board his majesty's ship Namur, in Gibraltar Bay, this 27 April, 1759. E. BOSCAWEN (autograph). To Capt. Medows, of his majesty's ship Shannon. By command of the admiral ALEX. MACPHERSON (autograph).
[1] The articles marked with an asterisk are additions subsequent to and not appearing in the earlier _Admiralty MS._ 252/24, 'Additional Fighting Instructions by Day' (see p. 108).