The United States Supreme Court is the final arbiter of the Maritime Law, a unique and large body of federal common law, tempered by any controlling Congressional enactments. So, in recently decided Air & Liquid Sys. Corp. v. DeVries, the Court addressed the scope of the duty of a marine product manufacturer to warn of a potential harm from a part that is required to be incorporated into its product. Here, the part to be added contained asbestos, and it allegedly led to the deaths of two Navy sailors. Their families sued the manufacturer of pumps, blowers, and turbines, but not the manufacturer of the asbestos-containing added part that actually caused the harm. The Supreme Court sided with the families.