Radar

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Samus Aran's Radar is an object detection system that identifies the range, altitude, direction, or speed of both moving and fixed objects. It is used in the Combat Visor's display, and other Visors where Samus is able to shoot (as such it is not used in the Scan Visor's display).

[edit] Metroid Prime Manual

RADAR
"The wedge at the top of the circular radar display is Samus' field of vision. Enemies within the radar's range appear as orange dots."

[edit] Trivia

• Some creatures, like Chozo Ghosts, only can be seen by the radar when are visible; but when they makes themselves invisible, the radar can't mark them. Other creatures, like the Omega Pirate, can render themselves invisible, but the radar can mark regardless are or not visible.

Visors
Combat Visor | Scan Visor | Thermal Visor | X-Ray Visor Dark Visor | Echo Visor | Command Visor Hacker Mode | X-Ray Scope Threat Assessment | Radar | Infared Ray Scope