** POSSIBLE SPOILERS AHEAD **
IGN guides you to 100% sync in Sequence 08, Memory 01 of Assassin’s Creed IV: Black Flag, “Do Not Go Gently…”
Kenway sails for North Carolina to convince Ed Teach (Blackbeard) to return to the Carribean and the pirate’s life.
= 100% Sync Requirements =
– Kill 4 guards.
– Use heavy shot to incapacitate the Man O’War.