The Confederate Navy adopted explicit flags to suggest its ships' allegiance

https://jeffreypmty481.lakeviewbrief.com/posts/reenactment-quality-civil-war-flags-how-to-choose-the-best-for-your-event-2

The Confederate Navy adopted one of a kind flags to indicate its ships' allegiance and aim; those designs had been indispensable for identity amidst chaotic naval engagements.