 Exactly the same movement might be executed from leeward, though in that case the enemy's rear would be forced to give way to windward, thus exposing itself to the fire of the centre and rear ships of the attacking fleet.Mazarredo also drew up a signal book, specifically for Córdova's fleet, which was printed in 1781.It was used in the operations against Minorca and Gibraltar, and it does not seem unreasonable that Córdova's signalling system was somewhat similar when he first joined comte d'Orvilliers in 1778.