U.S. ROANOKE. British. ROYAL SOVEREIGN. Russian. ADMIRAL LAZAREFF. French. AMIRAL BAUDIN. German. BRANDENBURG. U.S. S. CAROLINA. CENTRE-LINE SHIPS OF VARIOUS DATES.] One of the earliest advocates, if not the first of modern advocates, of the centre-line in England was Admiral Hopkins. Discussing the original Cuniberti ideal, Admiral Hopkins pointed out that although for an absolute right-ahead or astern fire wing-turrets gave an advantage, a very slight yaw entirely altered the proportion, and that circumstance in which the enemy was dead right-ahead necessitating such a yaw were likely to occur very rarely indeed in war. He leaned, therefore, to the opinion that a fewer number of guns all in the centre line would be equally as efficacious, practically, as a larger number disposed partly in wing turrets. The échelon system, of course, renders practically no assistance here, the arc of the guns firing across the deck being necessarily restricted, even with the best échelon arrangement. While, therefore, the échelon system is good for absolute end-on, or for more or less absolute broadside firing, any intermediate and more probable position renders it less efficient than a centre-line arrangement. Another defect of the échelon system is that with it, except exactly end-on, one side of the ship is necessarily more efficient than the other, and that this is reversed according to whether the enemy is ahead or astern, twenty-five per cent. of the big-gun armament being affected thereby in a four turreted ship. Though attention never seems to have been drawn to the matter, it is a fact worthy of some attention that the _Von der Tann_, which is to be regarded as Germany’s “answer” to the _Invincibles_, has (like all German[34] ships on the same system) her échelonned turrets exactly in reverse order to British ones. All British ships have the port turret foremost; all German ones the starboard. The net result of this is that (as the diagram indicates) there are two worst and two best positions for either design. An _Invincible_ getting and keeping a _Von der Tann_ upon her starboard bow or port quarter would have a twenty-five per cent. superiority over her, while, supposing the German type to maintain a position on her starboard quarter or port bow she would be to the same extent over-matched, and to a certain extent “in chancery.”