What is the primary page used to display and modify the FMS flight plan?

• A. LEGS
• B. INIT REF
• C. PROG
• D. FIX

Answer: (A)

The main concept here is how an FMS presents and lets you edit the route. The LEGS page is designed to show the flight plan one segment at a time and allow direct editing of each segment. On this page you can view the sequence of legs, adjust the waypoint for a leg, insert or delete legs, and set per-leg details like altitude constraints, speeds, and transitions. That focused, leg-by-leg view makes it the natural place to display and modify the entire flight plan, since you can see the whole route laid out and change any part of it in one place.

INIT REF is for setting up initial data such as fuel, weights, and basic trip parameters, not for editing the route itself. PROG provides a progress-oriented view of the flight plan, showing sequencing and anticipated progress, which is useful for monitoring, but it isn’t the primary editing surface. FIX refers to a waypoint concept rather than a page used to display or modify the plan.