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Radar is a term which is  used to indicate that someone or something has or has not come to the attention of a person or group (e.g. on or off the radar). The acronym RADAR was coined in 1940 by the United States Navy for RAdio Detection And Ranging (or RAdio Direction And Ranging) for a system for detecting the presence, direction, distance, and speed of aircraft, ships, and other objects, by sending out pulses of high-frequency electromagnetic waves that are reflected off the object back to the source.

Episode References

The title of episode 106 is “Off Radar.”  In the episode,  eleven missing passengers (who no one was paying much attention to, hence “off everyone’s radar”) became known. Since there was so much other information for Ben and Vance to sift through, neither were aware of what was happening behind the red door of the barn. It took Cal’s sickness and Michaela’s investigation for all of this to come to light.

Other incidences the term “radar” has been used are:

  • On Flight 828 from Jamaica to New York, passengers were told that the plane experienced turbulence resulting from a sudden weather surge that was not on the radar (101.2).
  • While being detained a second time after the plane exploded on the tarmac, Ben tells Michaela that he wants to stay far off the government’s radar (102.2).
  • When asked where Thomas should be taken, Saanvi says it has to be somewhere off of Vance’s radar who was watching all of them.


Just as radar uses reflected radio waves broadcast over the air to determine the speed and position of a targeted object, Cal is receiving emotional, physical and mental information.1 There has been other incidents where Cal has received information. He not only knew the exact spot where Michaela and Ben left Thomas, he knew Thomas’ name  (105.16). No one had given him this information. He can also sense when someone is coming close, and even determine whether a  person behind a door is a threat (105.23). In episode 106, he’s receiving emotional, physical and mental information from a Bulgarian man named Marko.

  1. Manifest Season 1 Episode 6: Off Radar Recap by Metacrone at Metawitches.com

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Radar (Wikipedia)

A long-range radar antenna, known as ALTAIR, used to detect and track space objects in conjunction with ABM testing at the Ronald Reagan Test Site on Kwajalein Atoll.
Long-range radar antenna, used to track space objects and ballistic missiles.
Israeli military radar is typical of the type of radar used for air traffic control. The antenna rotates at a steady rate, sweeping the local airspace with a narrow vertical fan-shaped beam, to detect aircraft at all altitudes.
Radar of the type used for detection of aircraft. It rotates steadily, sweeping the airspace with a narrow beam.

Radar is a detection system that uses radio waves to determine the range, angle, or velocity of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. A radar system consists of a transmitter producing electromagnetic waves in the radio or microwaves domain, a transmitting antenna, a receiving antenna (often the same antenna is used for transmitting and receiving) and a receiver and processor to determine properties of the object(s). Radio waves (pulsed or continuous) from the transmitter reflect off the object and return to the receiver, giving information about the object's location and speed.

Radar was developed secretly for military use by several nations in the period before and during World War II. A key development was the cavity magnetron in the UK, which allowed the creation of relatively small systems with sub-meter resolution. The term RADAR was coined in 1940 by the United States Navy as an acronym for RAdio Detection And Ranging or RAdio Direction And Ranging. The term radar has since entered English and other languages as a common noun, losing all capitalization.

The modern uses of radar are highly diverse, including air and terrestrial traffic control, radar astronomy, air-defence systems, antimissile systems, marine radars to locate landmarks and other ships, aircraft anticollision systems, ocean surveillance systems, outer space surveillance and rendezvous systems, meteorological precipitation monitoring, altimetry and flight control systems, guided missile target locating systems, ground-penetrating radar for geological observations, and range-controlled radar for public health surveillance. High tech radar systems are associated with digital signal processing, machine learning and are capable of extracting useful information from very high noise levels.

Other systems similar to radar make use of other parts of the electromagnetic spectrum. One example is "lidar", which uses predominantly infrared light from lasers rather than radio waves.

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