What it probably means is that the US Navy (DOD PedoWood Office) is not officially endorsing the show.
If not officially endorsed, they have to make obvious errors in uniforms and other such items so that any footage is not time period or currently accurate in its depiction of the characters, plot line or such.
I never heard of that. Can you provide a cite?
The reverse is true. DOD Regulations have uniform errors built in to get their cooperation on shows and movies. Can’t disgrace a uniform if it’s technically not an accurate one. The errors are supposed to be there.
A show or movie may not have DOD cooperation, but many film so they can possibly get it later. Years ago somebody came up with a genius idea. DOD cooperation was initially not given for a show or movie but could be given later during post production. Made many productions behave themselves.