In addition to these commissioned officers there are Lieutenants and Ensigns who are watch officers; that is, they stand the watch of four hours on the bridge at sea, representing the Captain in seeing that the ship goes all right, and four hours on the after deck in port, where they direct and have charge of all that is going on. There is besides the engineering division, which is a sort of world all to itself. Then there are the warrant officers, the boatswain, gunner, electrical gunner, carpenter and machinists. They are what might be called the general foremen or superintendents. They are assisted by the petty officers, of whom there are three grades, and mates of various kinds, who are the foremen of the individual gangs of men in their work about ship. Pretty soon one begins to learn the signs and marks upon sleeves and other devices that tell the grade of this man and that. He also learns about seamen, ordinary seamen, yeomen (the clerks of each department), coxswains, jacks-o-the-dust, lamplighters, gun pointers, hospital attendants, shipwrights, the printer and the numerous other classifications into which the crew is divided. He learns that the crew is split up into various divisions and each division into various sections. The officers are called division officers when the responsibility for handling the men by divisions comes up. Then the passenger also learns how the entire crew is split up into watches so that some of the men are on deck and other duty at every hour of the day and night. He soon learns all about the hammock netting, where the hammocks of the men are stowed, and he can even find the places where the ditty boxes of the men are kept when not in use. He knows what things are in those little square ditty boxes, writing paper, photographs of those at home, mending material, brushes, blacking, possessions of every kind, all subject to inspection by the officers. Having mastered something of the personnel of the ship it is surprising how soon one falls into the drill routine. This is a more or less delicate subject about which to write, for the reason that tactical matters and certain drills the details of which are kept secret are not proper subjects for publication, and all correspondents with the fleet have bound themselves by written pledge never to reveal what they may learn about them. There are certain drills, however, which are common to all navies and a matter of ordinary routine, in reference to which there is no inhibition, inasmuch as the Navy Department has even authorized and approved publication of these details. You will find them all written out in the book "The American Battleship in Commission," written by an enlisted man.