XI. When any number of ships is occasionally detached from the fleet for the same purpose, they are, during their separation from the body of the fleet, to comply with all such signals as shall be made at any time, whilst the signal flag appropriated for that occasion remains abroad.
But the signals made to all ships so appointed, having the commander of a squadron or division with them, will be under the flag descriptive of such commander's squadron or division, whose signals and instructions they are to obey.
XII. Great care is to be taken at all times when coming to action not to fire upon the enemy either over or near any ships of the fleet, liable to be injured thereby; nor, when in order of battle, until the proper signal is made, and that the ships are properly placed in respect to situation and distance, although the signal may have been before put abroad.
And if, when the signal for battle is made, the ships are then steering down for the enemy in an oblique direction from each other, they are to haul to the wind, or to any order parallel with the enemy, to engage them as they arrive in a proper situation and distance, without waiting for any more particular signal or order for that purpose: regard being only had by the several commanders in these circumstances to the motions of the ships preceding them on the tack whereunto the course more inclines, and upon and towards which the enemy is formed for action, that they may have convenient space for hauling up clear of each other.
When our fleet is upon the contrary tack to that of the enemy, and standing towards them, and the admiral makes the signal to engage, the van ship is then to lead close along their line, with a moderate sail, and engage; the rest of the fleet doing the same, passing to windward or to leeward of the enemy, as the admiral may direct.
XIII. When weathering the enemy upon the contrary tack, and signal is made to engage their van, the leading ship is then to bear down to the van ship of the enemy, and engage, passing along their line to windward to the sternmost ship of their van squadron, then to haul off close to the wind, the rest of the fleet doing the same in succession.[3]
XIV. No ship is to separate in time of action from the body of the fleet, in pursuit of any small number of the enemy's ships beaten out of the line; nor until their main body be also disabled or broken: but the captains, who have disabled or forced their opponents out of the line, are to use their best endeavours to assist any ship of the fleet appearing to be much pressed, or the ships nearest to them, to hasten the defeat of the enemy, unless otherwise by signal, or particular instruction, directed.[4]
XV. When any ship in the fleet is so much disabled as to be in the utmost danger and hazard of being taken by the enemy, or destroyed, and makes the signal expressive of such extremity; the Captains of the nearest ships, most at liberty with respect to the state of their opponents in the enemy's line, are strictly enjoined to give all possible aid and protection to such disabled ship, as they are best able. And the captain of any frigate (or fireship) happening to be at that time in a situation convenient for the purpose, is equally required to use his utmost endeavours for the relief of such disabled ship, by joining in the attack of the ship of the enemy opposed to the disabled ship, if he sees opportunity to place his ship to advantage, by favouring the attempt of the fireship to lay the enemy on board, or by taking out any of the crew of the disabled ship, if practicable and necessary, as may be most expedient.
XVI. No captain, though much pressed by the enemy, is to quit his station in time of battle, if possible to be avoided, without permission first obtained from the commanding officer of his division, or other nearest flag officer, for that purpose; but, when compelled thereto by extreme necessity before any adequate assistance is furnished, or that he is ordered out of the line on that account, the nearest ships and those on each part of the disabled ship's station are timely to occupy the vacant space occasioned by her absence, before the enemy can take advantage thereof.
And if any captain shall be wanting in the due performance of his duty in time of battle, the commander of the division, or other flag officer nearest to him, is immediately to remove such deficient captain from his post, and appoint another commander to take the charge and conduct of the ship on that occasion.