She has a reputation that 'commands' attention/respect. [=people give her respect/attention because of her reputation]
In the United States, the President as the commander in chief is at the head of the military 'chain of command'.
She seems to be 'in (full) command of' the situation. [=she seems to have complete control of the situation]
(..) I can let you drown. But I can't bring this ship into Tortuga all by me onesy, savvy? So. Can you sail under the command of a pirate? Or can you not? Tortuga? Tortuga. More importantly, (..)2003 Pirates of the Caribbean: The Curse of the Black Pearl