navigator

noun

1. A person who navigates, especially an officer with that responsibility on a ship or an aircrew member with that responsibility on an aircraft.

   “The increases kept many navigator groups, which help people pick policies, very busy. At the United Way of Metropolitan Dallas, 34 navigators helped up to 120 residents select plans each week during this open enrollment season, which ran from November 1 through January 16, said Daniel Bouton, vice president for health and wellness at the nonprofit group.”

2. A sea explorer.

   “He felt having a Micronesian navigator meant he needed a pureblooded Polynesian, preferably a Hawaiian, as captain.”

3. A device that navigates an aircraft, automobile or missile.
4. A user interface that allows navigating through a structure of any kind.

   “Although the window looks like a view of files and folders on disk, the “folders” that appear here are called groups; they don't exist on disk. They appear in the navigator because it's convenient to group related files together […]”

5. (obsolete)A labourer on an engineering project such as a canal; a navvy.