Who is directly responsible to the commanding officer for posting all security watches and sentries?

The officer of the deck holds direct responsibility to the commanding officer for the critical task of posting all security watches and sentries. This position involves overseeing the operational watch during a vessel's underway or when in port status. The officer of the deck ensures that all security measures are adhered to, maintaining the safety of personnel and the ship. Their authority and responsibility encompass the supervision of watch personnel, ensuring that sentries are stationed effectively to monitor and protect against any potential threats.

While other roles, such as the command duty officer or the sergeant of the guard, have important responsibilities in the chain of command, it is specifically the officer of the deck who is tasked with the direct oversight of security watches. This distinction is essential for maintaining an organized and efficient watch-standing process, crucial for maritime operations.