Rear admiral (lower half) is a one-star flag officer, with the pay grade of O-7 in the United States Navy, the United States Coast Guard, the United States Public Health Service Commissioned Corps, and the National Oceanic and Atmospheric Administration Commissioned Officer Corps. The abbreviation for personnel from the USN, USCG, and NOAA is RDML, whereas for the USPHS, the rank abbreviation is RADM. Rear admiral (lower half) ranks above captain and below rear admiral(upper half). Rear admiral (lower half) is equivalent to the rank of brigadier general in the other uniformed services, and equivalent to the rank of commodore in most other navies. In the United States uniformed services, rear admiral (lower half) replaced the rank of commodore in 1985.