The 16mm projectionist performs a valuable service to the Navy training program ashore and afloat. All the skill of the motion picture industry, all the skill of the director and actors have gone into the making of a training film. All these skills will be lost unless the projectionist knows his job. Good projection does not call attention to itself; poor projection is marked by distractions and interruptions. These disturbances can be prevented by you if you know your projector and your job. This manual is not a technical service manual but is intended to provide a general understanding of the problems of 16mm motion picture and 35mm filmstrip projector operation. It gives many useful and practical hints that will help you, the projectionist, do a better job of showing Navy training films. For complete technical information referred to the instruction book that comes with the projector. - Introduction.