The same fundamentals apply as to staff organization. If proper functioning of staffs is generally understood, and if staffs are correctly organized to perform their functions, the basis for their sound organization will become a matter of general understanding. Such organization, so understood, becomes a powerful influence in behalf of unity of effort. Staff functions--i.e., characteristic activities of staffs--divide fundamentally into two classifications. These may be referred to, for convenience of terminology, as "general" and "special". The latter have to do with the characteristic operations of the command, rather than of the commander; they therefore relate to such matters as routine administration and to the technical aspects of movement, of the use of weapons, and of supply, sanitation, and hospitalization. The administrative, technical, and supply staff, thus broadly considered, may be said to be concerned with special functions relating to the operations of the command. By contrast, the functions of the commander, as such, have to do with the necessary supervision of these special functions and, more especially, with the important duty of planning for the future employment of the command. The supervisory and planning activities may, for purposes of differentiation from the specialties noted above, be properly described as general functions. They relate more particularly to the duties performed personally by the commander or, where such duties become too onerous for performance by one person, by specifically designated members of his staff. In our naval service, the higher commanders are provided, where appropriate, with a chief of staff, who coordinates and supervises the work of the entire staff. Provision is also made, where the nature and amount of the work to be done calls for such assignment, for the detail of additional staff officers to perform the important general functions mentioned above. Appropriate provision is also made for staff officers to care for the special functions inherent in the character of the particular command. The important general functions referred to are those relating to intelligence duties, and to operations. Intelligence duties have to do with the collection of information as to the enemy and the theater of operations, the analysis of this information, its evaluation, its conversion into intelligence by the process of drawing conclusions, i.e., by interpretation, and, finally, its dissemination to the command or to other appropriate destinations (page 161). Intelligence estimates and plans have been discussed previously (Chapters VII and VIII).