Analysis of information sources in references of the Wikipedia article "Master commandant" in English language version.
When the U.S. Navy's predecessor, the Continental Navy, was established in 1775, the first set of Navy regulations stipulated the commissioned offices of captain and lieutenant. When the United States Navy was created by Congress in 1794, the legislation again provided for the ranks of captain and lieutenant "who shall be appointed and commissioned in like manner as other officers of the United States are." In 1799, master commandant was authorized as a rank between lieutenant and captain. Although master commandant was changed to commander in 1837, this simple rank system survived intact until the Civil War.
Oddly, the 1802 regulations say nothing about the uniform of a master commandant, but from descriptions and subsequent uniform regulations, we know that Master Commandant John Cassin is wearing the proper uniform for his rank. Virtually the same as a captain's uniform, the only difference is his epaulet; instead of wearing one on each shoulder, he only wears one on the right.
When the U.S. Navy's predecessor, the Continental Navy, was established in 1775, the first set of Navy regulations stipulated the commissioned offices of captain and lieutenant. When the United States Navy was created by Congress in 1794, the legislation again provided for the ranks of captain and lieutenant "who shall be appointed and commissioned in like manner as other officers of the United States are." In 1799, master commandant was authorized as a rank between lieutenant and captain. Although master commandant was changed to commander in 1837, this simple rank system survived intact until the Civil War.
Oddly, the 1802 regulations say nothing about the uniform of a master commandant, but from descriptions and subsequent uniform regulations, we know that Master Commandant John Cassin is wearing the proper uniform for his rank. Virtually the same as a captain's uniform, the only difference is his epaulet; instead of wearing one on each shoulder, he only wears one on the right.