and staff duty NCOs at the battalion level, inspection of the arms rooms, motor pool and unit dining facilities. The duty officer will contact the commander and senior NCOs if emergency messages are sent to the unit. The duty officer usually carries a notebook and briefcase with a series of phone lists and checklists put together by the unit adjutant to guide the officer through their tour of duty. In the American Civil War, a general officer of the day was a general officer assigned the duties of responding to reports by the picket line, such as a flag of truce. In the Finnish armed forces, the duty officer (päivystäjä in Finnish), usually a conscript NCO, is responsible for maintaining the order in the unit, monitoring persons entering and leaving it and keeping count of its weapons. Their tour is 24 hours long and they have two assisting officers, usually privates, who relieve them during lunch, dinner, a recreation break and during the night. The duty officer is stationed behind a desk at the unit's main entrance which should be manned at all times. Corporate usage Civil aviation Duty officers are also known in the civil aviation food industry. Following a request of more sophisticated meal controls by air companies, this job has been recently created with the aim of strict control in all meals served in flights, usually for long haul public flights in most international airports. However, airline duty officers might also operate for private companies as for public companies (Such as "Air Canada", "Qatar Airways", "China Airlines"...). The Duty Officer (also known as "DO") operate in the frontline. They are in charge of controlling the right amount of food reserved and received, by interacting with co-workers from independent providers of airline catering and provisioning services. Thus, they have the responsibility to take in charge any problems occurring before the take-off (such as taking orders at the last minute, changing meals for allergies or religious reasons from customers). To validate their work, the DO must interact with the flight crew by making the chief cabin sign a receipt in order to part from their responsibility after the take-off. Airport DOs, in other hand, work for the airport operator and integrate the many areas of this facility in order to provide the best services to passengers and airlines. They represent the administrator as a person and must decide with