Rule B attachments are issued under Rule B of the
Supplemental Rules for Certain Admiralty and Maritime Claims of the
Federal Rules of Civil Procedure. Under that provision, the court is allowed to attach a defendant's property up to the value of the suit. Although these claims are filed during
in personam actions, they are
in rem in nature, as the Court is attaching property to the suit. This has been described as a "remedy
quasi in rem."