A court-martial was a military court empowered to determine the guilt of members of the armed forces subject to military law, and, if the defendant was found guilty, to decide upon punishment.

In the Republic of Cinnabar Navy, courts-martial were conducted before a panel of five officers deemed impartial to the case in question.

Commander Aban Slidell was court-martialled after executing three of his crewmen for mutiny during a training mission to Sexburga System. The court aquitted him of all charges.4:3

A court-martial was held any time an RCN ship was lost. It was the only way to clear the commanding officer in cases where the loss wasn't a result of his malfeasance or neglect.4:29