The Massachusetts In Rem Warren of Arrest-Vessel is a legal document issued by a court in Massachusetts ordering the seizure and detention of a vessel. This warrant typically applies to vessels that are suspected of being involved in illegal activities, such as smuggling, piracy, or tax evasion. It is issued to the Massachusetts Harbormaster, who is then responsible for executing the warrant and seizing the vessel. There are two types of Massachusetts In Rem Warren of Arrest-Vessel: the Pre-Trial Warren of Arrest-Vessel, and the Post-Trial Warren of Arrest-Vessel. The Pre-Trial Warren of Arrest-Vessel is issued before the trial of the vessel’s captain or owner, and is typically used to prevent the vessel from leaving the state. The Post-Trial Warren of Arrest-Vessel is issued after the trial has concluded and is used to enforce any fines or other penalties that have been imposed. Both warrants are issued to the Massachusetts Harbormaster, who is then responsible for executing the warrant and seizing the vessel.