What is the difference between primary flight display and navigation display?
The display unit that replaces the artificial horizon is called the primary flight display (PFD). If a separate display replaces the HSI, it is called the navigation display. The PFD displays all information critical to flight, including calibrated airspeed, altitude, heading, attitude, vertical speed and yaw. The left side of the display window contains a generic primary flight display (PFD), while the right side contains a generic navigation display (ND).
What is the main purpose of navigation?
Navigation is concerned with finding the way to the desired destination, avoiding collisions, conserving fuel, and meeting schedules. Navigation is derived from the Latin navis (“ship”) and agere (“to drive”). In aviation, there are many different forms of navigating. The most popular are pilotage, dead reckoning, radio navigation (i. VORs) or astronomical navigation (i. GPS).The field of navigation includes four general categories: land navigation, marine navigation, aeronautic navigation, and space navigation. It is also the term of art used for the specialized knowledge used by navigators to perform navigation tasks.In aviation, there are many different forms of navigating. The most popular are pilotage, dead reckoning, radio navigation (i. VORs) or astronomical navigation (i. GPS).