This quest is not available in game.
Fleet Master Seahorn in Booty Bay wants you to kill 10 Bloodsail Swashbucklers and bring back the Bloodsail Charts and the Bloodsail Orders.
Crazz speaks highly of your dedication to the Blackwater Raiders. I am going to trust you with a mission of extreme importance to the fleet.
Infiltrate the so-called southern command post the Bloodsail Buccaneers have established on the Wild Shore. Raid the encampment. Bring me their charts along with their written orders. We shall see exactly what those scum are up to.