A navigational scan displayed on screen
A navigational scan at high warp
A navigational scan was a type of scan which was performed when a starship was moved. The scan helped the helmsman to intervene and lay a new course to avoid collisions with interstellar phenomena or inorganic matter.
In 2369, moments after the runabout used by Captain Picard, Deanna Troi, Data, and Geordi La Forge experienced a collision with several temporal fragments, Picard gave the order to move away from these fragments. La Forge performed a navigational scan and displayed the result, that they were surrounded by many more temporal fragments. (TNG: "Timescape")
The same year, a forward navigational scan of the USS Rio Grande identified a nearby star as Idran. (DS9: "Emissary")
While encountering a type-4 quantum singularity and trying to escape from it at high warp, Harry Kim performed a navigational scan to verfiy the position of the USS Voyager. (VOY: "Parallax")