Strategy's work, therefore, in preparing the naval machine for work consists wholly in preparing the personnel. This preparing may be divided into two parts--preparing the existing fleet already mobilized and preparing the rest of the navy. _Preparing the Fleet_.--The fleet itself is always ready. This does not mean that, in time of profound peace, every ship in the fleet has all its men on board, its chain hove short, and its engines ready to turn over at a moment's notice; but it does mean that this condition is always approximated in whatever degree the necessities of the moment exact. Normally, it is not necessary to keep all the men on board; but whenever, or if ever, it becomes so necessary, the men can be kept on board and everything made ready for instant use. It is perfectly correct, therefore, to say that, so far as it may be necessary, a fleet in active commission is always ready. _Training_.--Before this state of readiness can be attained, however, a great deal of training has to be carried out; and this training must naturally be designed and prosecuted solely to attain this end. Unless this end be held constantly in view, and unless the methods of training be adapted to attain it, the training cannot possibly be effective. To go from any point to another point, one must proceed in the correct direction. If he proceeds in another direction, he will miss the point. The training of the fleet naturally must be in doing the things which the fleet would have to do in war. To decide what things these will probably be, resort must be had to the teachings of history, especially the most recent history, and to the teachings of the war problem, the chart maneuver, and the game-board. The part of the personnel which it is the most important to train is, of course, the commander-in-chief himself; and no reason is apparent for supposing that his training should be conducted on principles different from those that control the training of every other person in the fleet. Men being the same in general, their qualities differing only in degree, it is logical to conclude that, if a gun-pointer or coxswain is best trained by being made first to understand the principles that underlie the correct performance of his work, and then by being given a good deal of practice in performing it, a commander-in-chief, or a captain, engineer, or gunner, can be best trained under a similar plan. Knowledge and practice have always been the most effective means of acquiring skill, and probably will continue to be the best for some time to come. Owing to the fact that navies have been in existence for many years, the general qualifications of efficient naval officers are fairly well known; and they have always been the same in the most important particulars, though the recent coming of scientific apparatus has made available and valuable certain types of men not especially valuable before this scientific apparatus appeared.