This quest is not available in game.
Report your findings to First Mate Crazz in Booty Bay.
The map shows Booty Bay with a red "X" drawn precisely at the spot at which you are standing.
The scribbled text reads:
"You men are to secure a camp at this location and keep quiet. Wait for the signal from the southern command post before attacking. If anyone approaches you, kill them."
You will also receive: