ON a ship when the CO departs the command flag is taken down (the ensign or us flag remains up).... however it could be they are signaling POTUS departure .... or they may be getting ready to hoist a different flag ....
A good Q proof would be this:
3,500 posted on 01/10/2021 1:18:35 PM PST by grey_whiskers
(The opinions are solely those of the author and are subject to change with out notice.)