yes thats true. and on the opposite of that door is another door..there are some crew cabins behind that and there is a crew elevator on the left side of the corridor.
As an officer. I was both on the bridge, on the deck and in the machineroom. I did not do much work, only spectate and learn. (The work has to be done by trained employeers on a safe ship) Actually i did spot a malfunctioning emergency exit aft on deck 6 portside