Final answer:
The pilot must enter the initial position (LAT/LONG) for IRS (Inertial Reference System) alignment before takeoff. This allows the IRS to accurately determine the aircraft's position during the flight for navigation purposes.
Step-by-step explanation:
The pilot must enter the initial position (LAT/LONG) for IRS (Inertial Reference System) alignment before the aircraft takes off. The IRS is a navigation system that uses a computer and gyros to determine the aircraft's position. By entering the initial LAT/LONG in the IRS, the system can reference its position accurately in relation to the earth's coordinates.
For example, if a pilot is flying from New York to Los Angeles, they would enter the specific LAT/LONG coordinates of their departure airport in New York before takeoff. This allows the IRS to establish a starting reference point and continuously calculate the aircraft's position during the flight.
Entering the initial position accurately is crucial for the IRS to provide precise navigation information throughout the flight. It helps ensure that the aircraft stays on the correct course, maintains accurate heading, and accurately calculates distances and times for navigation purposes.