This report describes the work completed during the first project year of this research study. The objective of the study is to identify safe weight and location limits of head-supported devices worn by female aviators during simulated helicopter rides. The working hypothesis is that female pilots will tolerate some range of HSD weight moments beyond which their biomechanical and performance responses will deteriorate. The report contains a review of relevant studies followed by detailed description of the experimental and analytical procedures. This includes discussions of .human use issues, test instrumentation hardware, types vibration exposures (random and sinusoidal), and the rationale for the experimental design. The study design calls for 12 subjects to be tested to obtain physiological, biomechanical, and performance data. So far, a complete data set was obtained from one subject only. Therefore, no firm conclusions are drawn at this time. Instead, samples of data that were processed are presented in the appendices to demonstrate the type of the data being collected, and the type of analyses being performed as data are generated. The report concludes by listing some of the problems that were encountered and how they were (or are being) addressed.