High Ground

High Ground is a Railroad radiant quest in Fallout 4.

Detailed walkthrough
P.A.M. wants the Sole Survivor to clear up remnants of the Brotherhood of Steel, so P.A.M. sends them to bring down a Vertibird patrol.

Bugs

 * Even if all the conditions are met, P.A.M. may never offer this quest no matter how many times she is spoken to.
 * The quest may be started manually on PC via the console by typing and then speaking to P.A.M.
 * The Vertibird may fall through the ground after fast traveling, making the quest unable to be completed.
 * In some cases, the Vertibird flies outside of the map, making it impossible to destroy.
 * Sometimes, if the Vertibird loses track of the player character (while crouching, the player character's stealth status goes from Danger to Caution), the Vertibird will disengage and fly away to Fort Hagen, rising to the highest elevation possible on the map. This makes it impossible to destroy without console commands because it is far outside the maximum weapon range.
 * Toggling collision off and "walking" up within range allows for a kill, but the Vertibird never re-engages.