This paper reviews the functional requirements of a Training Management System (TMS) for a typical Aircrew Training System (ATS), Requirements Include: to maintain all appropriate records for students, instructors, training equipment, and curricula; to manage the progress of individual students as they undertake training, and progressively confirm that students acquire the required skills and knowledge; to identify any deficiencies of individual students, and recommend appropriate corrective action (remediation), to perform optimal scheduling of students, instructors and training equipment, resolve scheduling conflicts, and cope with the inevitable short-term reassignments; to evaluate the overall ATS by analyzing student data, establishing meaningful trends, and to generate reports, so that the overall ATS can be improved. The TMS must be utilized by a variety of user classes, while ensuring appropriate data security. A proposed TMS system architecture is described which includes a UNIX computer system, terminals, optical mark readers, and modems for communicating across the bases, and between sites. Application code is written in a fourth generation database language supplemented by C code where required.