It means that the ship has armed guards on board.
These are to defend the ship against piracy particularly off Africa and in the straits around Indonesia/south Asia where piracy is rife.
Does anyone think it is odd
Yesterday the Egyptian president ordered that preparations be made to remove containers from the Ever Given to lighten the load to refloat the ship.
Today quite miraculously the ship is freed from its grounding.
Wonder if there is something in the containers that (((they))) don't want found.
Hmmm…