author
Behind this name is the U.S. Navy office that oversaw naval weapons and equipment, producing practical manuals and technical guides rather than the work of a single individual. Its publications reflect the detailed, hands-on style of military instruction and engineering from their era.

by United States. Navy Department. Bureau of Ordnance

by United States. Navy Department. Bureau of Ordnance
This credited author is not a person but a government body: the Bureau of Ordnance within the United States Navy Department. It was responsible for naval guns, ammunition, torpedoes, and related equipment, and its name appears on manuals, instructions, and technical publications issued for Navy use.
Because of that, the works published under this name are usually collaborative and official in tone. They were prepared to explain procedures, equipment, maintenance, and training, giving readers a direct look at how the Navy documented technology and operations.
For an audiobook or library listing, it helps to think of this author credit as an institutional source. The value of these works comes from their authority as Navy-issued documents and from the historical window they offer into military engineering and administration.