Refueling a ship at Port Brisbane typically involves a bunkering process where a specialized fuel supply vessel, often called a bunker barge or tanker, approaches the cruise ship, such as the Carnival ship in your video, while it is docked. The refueling vessel connects hoses to the cruise ship’s fuel intake points, and fuel—usually marine diesel or heavy fuel oil—is pumped directly into the ship’s tanks. This process is carefully coordinated with port authorities and the ship’s crew to ensure safety, often taking place under strict regulations to prevent spills or hazards. The refueling can occur alongside other activities, like the presence of a warship nearby, as seen in your video, without interrupting port operations. The duration varies depending on the ship’s size and fuel needs, but it can take several hours.