It was originally developed for shipboard use, but proved unsuitable for shipboard environments and was discontinued in 2019.
Khakis were authorized aboard submarines in 1931 and as an officer's working uniform on all ships in 1941.
Navy's daily wear uniforms, and exist in several variations.
The prescribed headgear is a white , although a navy blue is optional in some situations when the jacket is not worn, unless stated otherwise by the prescribing authority.
The civilian equivalent is a business suit.
Garrison caps were an optional secondary headgear, allowed to be worn for all ranks.