These self-study materials are a basic course for Marines working as mechanics. The course contains three study units. The first unit explains mechanics' hand tools and their proper care and usage. The second unit introduces the duties of the personnel at a basic level, describes the areas of a typical shop, and deals with shop operations and equipment. The third unit covers shop safety and firefighting procedures and explains the purposes and background of the different guidelines found in a typical shop. Each of the three study units begins with a general objective, which is a statement of what the student should learn from the unit. The study units are divided into numbered work units, each presenting one or more specific objectives. Text is illustrated as needed for each work unit. At the end of the work units are study questions, with answers listed at the end of the study unit. A review lesson completes the course. (KC)