Recent studies have found that hemorrhage is the cause of 83% to 87% of potentially survivable combat deaths. To address this issue, increased use of tourniquets and hemostatic agents has been emphasized in training. In an effort to improve the technology used in the training of tourniquet application, a number of prototype partial task trainers have been developed by the Army Research Laboratory's Simulation and Training Technology Center. These trainers simulate the look and feel of a wounded human arm with simulated brachial and radial pulses. Each trainer can simulate arterial and venous bleeding. After proper tourniquet application, the device responds with appropriate feedback, including cessation of both bleeding and pulse. With the variety of capabilities available in these devices, it is important to objectively analyze the devices for usability in training scenarios. The study included approximately 10 participants attempting to apply a tourniquet to each training arm and ultimately stop simulated blood loss. This study analyzed a number of usability metrics gathered during the study including: task completion, time of task, efficiency, and self-reported metrics. Finally, the results of the analysis are reported, along with discussion of the findings in respect to future development of partial task trainers, including a thigh tourniquet trainer.