To achieve correctness in decision the members of the staff must be highly trained.

To devise and develop a good scheme of staff training, several years may be required.
_Third Scheme_ .-- The third kind of game is that in which the fleet is divided into two parts, fairly equal in each of the various elements, battleships, battle cruisers, destroyers, submarines, aircraft, etc.

This scheme gives opportunity for more realistic situations than the other two, since each side operates and sees vessels and formations similar to those that it would operate and see in war; and it gives opportunity for games which combine both strategical and tactical operations and situations to a greater degree than do the other two schemes.

Its only weakness is the fact that the entire fleet is not operated as a unit; not even a large fraction, but only about one-half.

Like each of the other two schemes, however, it has its distinctive field of usefulness.
Its main advantage is its realism--the fact that two powerful naval forces, each composed of all the elements of a naval force, seek each other out; or else one evades and the other seeks; and then finally they fight a fairly realistic battle; or else one successfully evades the other; or else minor actions occur between detachments, and no major result occurs; just as happens in war.
Strategically, this scheme is less valuable than the other two; tactically, more so.