Approved for public release, distribution is unlimited / This thesis is a qualitative analysis of selection to Rear Admiral (Lower Half) in the United States Navy. Specifically, this thesis examines the variables in the career of senior US Navy officers that can be considered as factors in determining advancement at the O-7 selection board. The researcher conducted 18 semi-structured interviews with active duty and retired flag officers, using a protocol based on an analysis of archival data from flag officers promoted from year groups 1972 to 1978, and relevant literature to determine what factors are considered during the selection board process. Overall, the data indicate that select background and performance variables are important factors in the promotion of flag officers. Examples include the importance of reputation and fitness report rankings and the lack of weight given to factors such as commissioning source and letters of recommendation. / Lieutenant, United States Navy