Here's a complete guide with the locations of all treasure chests and the Ultimate Mortar Plan upgrade in the Antocha Wreck in AC Black Flag Resynced. Related Assassin's Creed Black Flag Resynced: Anotto Bay Chests & Secret Locations Here's how players can enter the Anotto Bay island in Assassin's Creed Black Flag Resynced and get all the treasure chests and the secret inside. All Antocha Wreck Treasure Chest Locations in AC Black Flag ResyncedThe Antocha Wreck (600, 635) is located directly south of Nassau in the Gibara region. Antocha Wreck Chest #1 LocationThe first chest is located right in front of Edward as soon as he descends into the Antocha Wreck through the Diving Bell. This is where you will find the fifth treasure chest in the Antocha Wreck in AC Black Flag Resynced.