Blip
A blip was a short burst of light and high-pitched sound that indicated the intermittent presence of an object in the range of a scanner's detection.

In 1969, United States Army Technician  noticed a blip on a RADAR screen which turned out to be the , which had traveled there from the year 2267. ()

On the Enterprises bridge in 2266, Spock noticed a blip on the starship's motion sensor which seemed to indicate the presence of a Romulan Bird-of-Prey; later, he noticed it had changed its heading, moving in a "leisurely maneuver." ()

In 2367, the  picked up three blips on the E-band: two originating on the ship, one on the surface of Krios. While initially attributing it to a potential protostar, it was determined that the transmission was Romulan in origin, which aided the Enterprises crew in uncovering a Romulan plot to compel Geordi La Forge to murder Klingon Governor Vagh. ()

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Sensor technology