What is required during the night duty routine apart from locking doors?

Filling out the log book is a crucial part of the night duty routine because it provides a formal record of all the activities, occurrences, and any unusual incidents that take place during the watch. This log serves as an official document that can be referred to later for accountability and can help in tracking the day's events in an organized manner. Properly maintaining the log ensures that there is a continuous record of operations and communications, which is vital for command awareness and operational integrity.

Conducting inspections may be a responsibility during some shifts, but it generally does not happen at every moment of the night duty routine and is often part of specific training or procedural checks. Raising the national ensign is typically a morning or ceremonial function, and contacting the Battalion Commander would only occur in specific circumstances that require immediate attention, making these options less applicable to the general night duty routine.