This Private Industry Notification (PIN) highlights the use of Global Positioning Systems (GPS) jammers by criminals to thwart law enforcement response and investigation into cargo thefts in the United States. Since at least February 2012, various law enforcement and private sector partners have reported that GPS tracking devices have been jammed by criminals engaged in nefarious activity including cargo theft and illicit shipping of goods. Although banned by federal law, the jammers are readily available over the Internet and easy to employ.