VII.  If the admiral should observe that the enemy has altered his course, and the disposition of his order of battle, one, two, three, or any greater number of points (in which case it will be necessary to make a suitable change in the bearing of the ships from each other in the British fleet, supposed to be formed in such respects correspondently to the first position of the enemy), he will make the signal for altering course in succession, according to the nature of the occasion.  The leading ship of the line is thereupon immediately to alter to the course pointed out; and (the others taking their places astern of her in succession, as they arrive in the wake of that ship and of their seconds ahead respectively) she is to lead the fleet in line of battle ahead on the course so denoted, until farther order.

VIII.  When it is necessary to shorten or make more sail whilst the fleet is in order of battle, and the proper signal in either case has been made, the fleet is to be regulated by the example of the frigate appointed to repeat signals; which frigate is to set or take in the sail the admiral is observed to do.

The ship referred to is thereupon to suit her sail to the known comparative rate of sailing between her and the admiral’s ship.

Hence it will be necessary that the captains of the fleet be very attentive to acquire a perfect knowledge of the comparative rate of sailing between their own and the admiral’s ship, so as under whatever sail the admiral may be, they may know what proportion to carry, to go at an equal rate with him.

IX.  When, the ships of the fleet being more in number than the enemy, the admiral sees proper to order any particular ships to withdraw from the line, they are to be placed in a proper situation, in readiness to be employed occasionally as circumstances may thereafter require—­to windward of the fleet, if then having the weather-gage of the enemy, or towards the van and ahead, if the contrary—­to relieve, or go to the assistance of any disabled ship, or otherwise act, as by signal directed.

The captains of ships, stationed next astern of those so withdrawn, are directly to close to the van, and fill up the vacant spaces thereby made in the line.

When, in presence of an enemy, the admiral or commander of any division of the fleet finds it necessary to change his station in the line, in order to oppose himself against the admiral or commander in a similar part of the enemy’s line, he will make the signal for that purpose; and the ships referred to on this occasion are to place themselves forthwith against the ships of the enemy, that would otherwise by such alteration remain unopposed.

X. When the fleet is sailing in a line of battle ahead, or upon any other bearing, and the signal is made for the ships to keep in more open order, it will be generally meant that they should keep from one to two cables’ length asunder, according as the milder or rougher state of the weather may require; also that they should close to the distance of half a cable, or at least a cable’s length, in similar circumstances, when the signal for that purpose is put abroad.