Focal Lunar Landing Simulation (Apollo)

This document provides a program listing and documentation for a lunar landing simulation written in FOCAL. The simulation is designed to mimic an Apollo mission landing based on NASA figures. Users start at an altitude of 120 miles with 16,000 pounds of fuel and a velocity of 2,600 miles per hour. Every 10 seconds, the program provides a radar status update (velocity, altitude, fuel remaining), and the user must determine the fuel burn rate for the next interval to ensure a safe landing. The document includes the program's abstract, operating restrictions (noting that FOCAL's extended functions cannot be used), and the complete source code.