In 1960, the FAA began to require the use of , which send a radar beacon – or “squawk” – identifying the aircraft. The controllers would write this information on plastic “shrimp boats” that they pushed along with sticks on tabletop radar scopes.

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In 1960, the FAA began to require the use of                          , which send a radar beacon – or “squawk” – identifying the aircraft. The controllers would write this information on plastic “shrimp boats” that they pushed along with sticks on tabletop radar scopes.

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The question describes a 1960 FAA requirement involving a device that sends a radar beacon to identify the aircraft, which was displayed on plastic so-called shrimps boats moved along a radar display. This points to a system that actively identifies the airplane by emitting a signal.

Option 1: Radios. While radios are used for communication between pilots and air traffic controllers, they do not themselves provide automatic identification on radar displays by emitting a beacon. Radios transmit voice or data, but the specific beaconing and squawking mechanism described is different from plain radio communication.

Option 2: Transponders. This option aligns with the described concept of a radar beacon that identifies the aircraft. A transponder responds to radar interrogation with a coded reply, allowing controllers to see a discrete squawk code and aircraft identity on the radar scope. The historical note about pushing shrimp boats (erasable or movable display indicators) along the radar screen matches the era when transponder-based identification (squawking) was implemented.

Option 3: Navigators. Navigators are crew members responsible for determining a craft’s position and course, not devices that emit beacon signals for radar identification. They play a role in flight planning and situational awareness, but they do not generate the radar-identifying beacon described.

Option 4: Strobe lights. Strobe lights are visual signaling devices used for conspicuity, not for radar identification. They do not convey position or identity to radar systems in the manner described, so they do not fulfill the function of a radar beacon used for squawking.

Putting the pieces together, the mechanism described—the radar beacon that identifies the aircraft and is used by controllers to label the aircraft on the display—fits the concept of a transponder responding to radar interrogations with a unique code. The other options do not provide this automatic identification capability or match the historical method used by air traffic control in that era.

FA25: AVIA-73 Sec 01 - Air Traffic Control 1.7 Quiz 1 - History of ATC

In 1960, the FAA began to require the use of , which send a radar beacon – or “squawk” – identifying the aircraft. The controllers would write this information on plastic “shrimp boats” that they pushed along with sticks on tabletop radar scopes.

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