Cost-effective military training devices are based on trainee needs not technological capabilities. This project developed specifications for training devices for Combat Systems operators, maintainers, and teams for the Canadian Patrol Frigate (CPF). An integrated training systems model included (a) determining resource requirements and (b) developing training content, methodology, and technical documentation based on task and performance data. Such models can guide the use of trainee requirements as the basis for trainer design and functionality. This paper provides an example of how to make the models work. Trainee tasks determined functional specifications for the hardware and software, in terms of (a) training media, (b) fidelity and simulation requirements, and (c) essential and desirable trainer characteristics. A resource requirements analysis indicated (a) the number of trainee positions needed in peak and steady-state conditions, and (b) the annual training input, instructor billets, and lab-loading requirements for the training devices in the Canadian Forces Fleet School setting.