American use of GPS jammer also a problem

There is also a GPS jammer threat within our own nation. While the Federal Communications Commission (FCC) made GPS jammers illegal in the United States, they still exist.

In 2015, pilots who flew to Northeast Philadelphia Airport reported that they had lost their GPS navigation signals as they approached the runway. The incident was caused by a truck driver who was parked in a nearby parking lot and disabled a tracking device using a GPS jammer he had bought.

Russian use of jammers interferes with GNSS

In recent years, the Russians have started blocking the GNSS. Initially, Russia only temporarily blocked or faked the GNSS to cover up President Putin's location. These tactics were intended to ensure Putin's safety and prevent weapons relying on satellite locations from tracking him.

For example, an incident with the ships in the Black Sea occurred when Putin was crossing the Kerch Bridge from Russia to Crimea. This resulted in 24 ships anchoring nearby showing their location at Anapa Airport, over 40 miles away.

Putin's palatial summer home near the Black Sea is also protected by a permanent GNSS spoofing zone. That gives his house the same level of airspace protection and GNS interference as the Kremlin.

However, Russia has expanded its GNSS jamming, blocking and spoofing in recent years. Your GPS jammers are so advanced that they can probably carry out widespread “attacks” on GNSS receivers, potentially disrupting all navigation systems in a selected area.

In order to prevent the illegal use of cell phones, 21 third generation (3G) jammers have been installed in 10 sub-prisons of the Tihar prison complex; Abhishek Sharan reports.

Prison sources said the new jammers using 3G electromagnetic signals and the 11 jammers created in recent years should improve the prison's ability to block mobile communications.

The source said, "3G jammers will improve our capabilities, as early wifi jammer can only prevent communications using second generation signals." The source said second-generation (2G) jammers can only block up to 50 meters. Mobile calls are vulnerable to attacks from upgraded 3G technologies.