Deck officer or navigation officer as the name suggests is in charge of the navigation of the ship. That particular department is called Deck department. The captain or the master of the ship is in charge of the ship. He is not only responsible for the safe navigation of the vessel but also for the discipline on the ship and safety of passengers, crew and the cargo. He must ensure the observance of national and international codes of conduct guiding sea transportation. The captain of the ship is further assisted by first mate, second mate and third mates. The First Mate / Chief officer is the right-hand man to the Captain; the second in-command. He overseers all the cargo planning, assists during navigation, allocates duties and work for the maintenance and upkeep of the ship to the Deck Cadets and deck crew, ensures that discipline and order are maintained. The Second Mate / Second officer, assistant to the First Mate is in-charge of checking all mails and keeping the navigational equipment and charts in good condition and also assists in navigational watches at sea and cargo watches at port. The Third Mate / Third officer is responsible for keeping safety equipments -the lifeboats, fire-fighting and signaling equipment in top condition; acts in the capacity of signal officer and assists with cargo work.