You are shooting a muzzleloader. a hang fire happens. what should you do? take the gun back home to correct the problem. look down the muzzle to identify the obstruction. keep the gun pointed downrange. reload and fire again.

I believe the answer is Keep the gun pointed downrange.
Hang fire to abnormal delay that happen after you pull the trigger and projectile of the bullet.
This happen because some of broken mechanism inside  your gun that could  make the gun throw out the bullet longer than it should. Pointing it downrange is necessary in order to prevent the bullet from hurting others.

It should be at the center of any map going vertically: the prime meridian, as it passes through greenwich,  england, is considered 0 degrees longitude