For the signification of the plain signal without the red pennant over--_i.e._ 'to break through ...

and engage on the other side'-- seems to contemplate Howe's manoeuvre being made both from to-leeward and from to-windward.
The only notable disappearances in Howe's second code (1790) are the signals for 'doubling,' probably as a corollary of the new manoeuvre.

For, until this device was hit upon, Rodney's method of breaking the line apparently could only be made effective as a means of concentration by doubling on the part cut off in accordance with Hoste's method.

This at least is what Clerk of Eldin seems to imply in some of his diagrams, in so far as he suggests any method of dealing with the part cut off.

Yet in spite of this disappearance Nelson certainly doubled at the Nile, and according to Captain Edward Berry, who was captain of his flagship, he did it deliberately.