Definitions
1.NounA person who navigates, especially an officer with that responsibility on a ship or an aircrew member with that responsibility on an aircraft.
2.NounA sea explorer.
3.NounA device that navigates an aircraft, automobile or missile.
4.NounA user interface that allows navigating through a structure of any kind.
5.NounA labourer on an engineering project such as a canal; a navvy.