This thread raises an interesting discussion ref the difference between:
1. In command
2. In charge/control/responsible for.
They are very different and, for the non-cogniscienti may I point out the difference.
1 means that one is irrevocably responsible for everything which happens within ones sphere of command. e.g. ship master, airline captain, military theatre commander.
2 means that one is looking after a delegated area under a commander.
For instance, when I was a Merchant Navy officer I was in charge of the ship to the extent delegated by the captain. Now that I am an airline captain, I am in command of the aircraft to the far greater extent that my MN captain was in command of his ship.
Seems a very simple concept to me but I am quite, how shall I say, surprised by the number of people who cannot grasp it.