To avoid to blacking out at these points, you must either use the air barrels dropped by your crew (they are the barrel-shaped images on your mini-map) or return to the diving bell. When your air is critically low, the gauge will turn red and the rest of the screen will go black and white. There are three main hazards in shipwrecks, all with their own annoyances.Īfter you've begun your dive, a gauge will appear in the center of your screen to let you know how much air you have left. This is a guide to the Assassin's Creed 4: Black Flag shipwreck locations and coordinates. If you have the diving bell, once you dock, you should start the sequence to go under water and begin the dive. On location, a shipwreck typically looks like a mass (either mast or other ship part) rising out of the water with a blue circle around it where you can 'dock.' Shipwrecks are denoted on the main and mini-maps by a diving bell-like shape. In a period appropriate fashion, these treasures will not be easy to grab and will require scouring the bottom of the sea as well as dilapidated boats. Shipwrecks dot the Caribbean seas, with treasure chests for the taking.