It seems generally to signify short sudden attacks on weak points.
[4] Here follow directions for telling off a fourth of the largest boats in the fleet for certain duties which are sufficiently explained in the section on 'Battle' below.
[5] _Unos en pos de otros a la hila_--lit.

one behind the other in file.
[6] _En escuadrones o en ala_.

In military diction these words meant 'deep formation' and 'single line.' Here probably _ala_ means line abreast.

See next note.
[7] _Cado uno de los escuadrones debe ir en ala_.

Here _escuadrone_ must mean 'squadron' in the modern sense of a division, and from the context _ala_ can mean nothing but 'line abreast,' 'line ahead' being strictly forbidden.
[8] This, of course, refers to fire tactics ashore.