Ping is a an Elite perk introduced in Call of Duty: Ghosts. When a player kills an enemy, the perk will "ping" a radar circle on the minimap (the size of 700 units, or 7 meters) where the enemy fell, which will notify the player if there are any enemies in the vicinity. It is useful when there are scenarios where there will be two or more enemies, or a large group of enemies near the player's kill. Players using Off the Grid won't show up on the map, but a sound effect occurs when an enemy is in the circle, regardless of exactly where they are. These effects are personal, and act like a Level 1 SATCOM, in which an empty dot would show up.