This Rate Training Manual (textbook) and Nonresident Career Course form a correspondence self-study package to teach the theoretical knowledge and mental skills needed by the Machinery Repairman Third Class and Second Class. The 15 chapters in the textbook are (1) Scope of the Machinery Repairman Rating; (2) Toolrooms and Tools; (3) Layout and Benchwork; (4) Metals and Plastics; (5) Power Saws and Drilling Machines; (6) Offhand Grinding of Tools; (7) Lathes and Attachments; (8) Basic Engine Lathe Operations; (9) Advanced Engine Lathe Operations; (10) Turret Lathes and Turret Lathe Operations; (11) Milling Machines and Milling Operations; (12) Shapers, Planers, and Engravers; (13) Precision Grinding Machines; (14) Metal Buildup; and (15) The (Shipboard) Repair Department and Repair Work. Appendixes include Tabular Information of Benefit to Machinery Repairman (23 tables), Formulas for Spur Gearing, Formulas for Diametral Pitch System, and Glossary. The Nonresident Career Course follows the index. It contains 11 assignments, which are organized into the following format: textbook assignment and learning objectives with related sets of teaching items to be answered. (YLB)