When is it appropriate to wear a cover indoors?

Wearing a cover indoors is appropriate only when a Marine is under arms and on duty. This practice is rooted in military tradition and discipline. When a Marine is armed and performing their duty, it signifies a state of readiness and alertness, which is why wearing the cover, or service cap, reflects that commitment and compliance with military regulations.

In situations other than being under arms and on duty, the expectation typically shifts toward a more relaxed or formal etiquette where it is generally customary to remove the cover indoors. This acknowledges the decorum of different environments, promoting respect and proper conduct related to military bearing.