In the game Elite Dangerous, the "Comp Scanner" refers to the Composition Scanner, a tool used primarily for scanning organic and geological features to determine their composition. This scanner is useful in exploration when scanning plants, space-borne lifeforms, and geological landmarks to add information to the in-game Codex and potentially sell valuable data. Here is a brief overview of related scanners in Elite Dangerous:

• Composition Scanner (Comp Scanner): Scans biological and geological objects, used for identifying composition and adding data to the Codex. It must be assigned to a firegroup for use. Both ships and surface vehicles (SRV) can be equipped with this scanner.
• Discovery Scanner: A basic short-range scanner that helps discover astronomical objects within a star system. It is often the first step when entering a new system.
• Full Spectrum System Scanner (FSS): Provides detailed scans of planets, stations, and signal sources within a system after using the Discovery Scanner.
• Data Link Scanner: Used to interact closely with large structures or data points, sometimes for mission objectives.
• Detailed Surface Scanner (DSS): Maps the surface of planets for high-value data, requiring the ship to fly close to the planetary body.

The Composition Scanner plays a vital role in exploration missions focused on scanning alien lifeforms and geological formations to gather data for credits and contribution to the codex database.