In the case of The Mary, Stafford, Master (1815), the Supreme Court was asked to decide whether a master of a vessel had authority to punish sailors for misconduct. The court held that masters have such authority and can impose reasonable punishments on their crew members as long as they do not exceed what is necessary in order to maintain discipline aboard ship. In addition, the court found that if any punishment imposed by a master exceeds what is necessary or reasonable under the circumstances then it would be considered an act of oppression and could result in legal action against them. This decision established important precedent regarding maritime law and set forth clear guidelines for how captains should treat their crews when punishing them for misbehavior while at sea.

In The Mary, Stafford, Master case the Supreme Court was asked to decide whether a master of a vessel could be held liable for damages caused by his negligence. The majority opinion found that he could not and dismissed the claim against him. However, Justice Johnson dissented from this decision arguing that masters should be held accountable for their actions while in command of vessels as they are responsible for ensuring safety on board and preventing any harm or damage to persons or property. He argued that it is only fair to hold them liable when they fail in these duties due to their own negligence or recklessness since such conduct can cause serious injury and loss of life at sea. Furthermore, he noted that if masters were allowed immunity from liability then there would be no incentive for them to exercise proper care which would lead to more accidents occurring on ships under their command.