FARGO, N.D.  Federal Customs and Border Protection authorities are preparing to launch unmanned aircraft patrols from this state, the first time such monitoring will occur along the nation’s northern border.

A Predator B aircraft, delivered to Grand Forks on Saturday, will make runs along the northern edge of North Dakota using sensors that can provide video and detect heat and changes to landscape, Customs and Border Protection officials said.

The plane, which can go 260 miles per hour and fly as high as 50,000 feet, can stay aloft for 18 hours. The first missions, designed to help spot people crossing the border illegally or avoiding ports of entry, are expected to start next month.

Similar aircraft have patrolled the nation’s southern border since 2005, where they have helped lead to the discovery of more than 18,000 pounds of marijuana and 4,000 illegal immigrants, a spokesman for the agency said.