Twentieth Century Navigation Crossword Puzzle

QUESTIONS LIST:

• transponder : a radar receiver and transmitter carried by all airplanes in america that allows airport traffic control centers to keep track of all the planes
• air traffic controller : someone who works as part of the air traffic control system to maintain a safe and orderly flow of air traffic so there are no mid-air collisions
• vhf : stands for very high frequency, used in fm radio, tv broadcasts, and aircraft communications
• scope : a radar viewing monitor
• pip : a radar echo, a spot on a radar screen, that shows the position of a reflecting object. also called a blip.
• inertial guidance : guidance of an aircraft or spaceship using the instruments that measure direction and speed and a computer to maintain a predetermined course
• gyroscope : a spinning disk or wheel that spins freely on its base regardless of any movement of the base
• acronym : a word formed from the initial letters of a multi-word name, like gps
• sputnik : a series of soviet satellites, from the russian words for fellow traveler
• ballistic missile : a missile that is guided in the first part of its trajectory, but falls freely at the end