Grid search pattern
A diagram of a grid search pattern
A grid search pattern was a type of flight pattern in which a meticulous search for something was made, square by square.
In 2154, Jonathan Archer noted that those pursuing him and T'Pol on Vulcan were following a grid search pattern. (ENT: "The Forge")
In 2370, grid search pattern H522-3 was displayed on USS Enterprise-D's screen. (TNG: "Force of Nature")