BVR

BVR refers to a type of combat in which opponents are Beyond Visual Range, meaning you must rely on either skilled guesswork or your long-range turret's tracking to guide your shots at your enemy.

Note: In an attempt to combat this, the Dominion Update introduced a dynamic render distance, which increases to 22 chunks (about 352 blocks, but may decrease if server performance is suffering) when in combat, making it slightly easier to see enemies during combat. However, some weapons may still be able to hit outside this range, meaning it's not entirely gone, just reduced.