What are the shoulder boards worn by Naval Officers called?

The shoulder boards worn by Naval Officers are referred to as epaulettes. This term is derived from the French word for "little shoulder," and it accurately describes the ornamental shoulder pieces that signify rank and branch of service. Epaulettes serve as an essential element of a naval officer's uniform, allowing for clear identification of rank without the need for verbal communication. They are typically made of various materials and can feature distinctive designs that denote different ranks or special qualifications.

The other terms provided do not accurately define this specific part of the uniform. Shoulder straps, for example, could refer to various types of straps used in different contexts and are not specific to naval uniforms. Rank boards, while they might seem relevant, do not commonly refer to the shoulder decorations in a maritime context. Officer shields is not a conventional term associated with naval uniforms, further emphasizing the importance of using the correct terminology.