Rogue toy drones - a hot Christmas gift this season and last year - are beginning to disrupt military operations at multiple bases across the country. Sales of consumer drones are expected to approach 700,000 this year, and military officials say they are bracing for the problem to get worse and fear a possible aviation disaster.

How to stop terrorist attacks using commercial drones

In June 2015, an Air Force KC-10 aerial tanker flying at an altitude of 3,800 feet over suburban Philadelphia was forced to take evasive action and narrowly avoided hitting a football-sized drone that passed within 10 feet of its right wing.

According to reports filed with the Armed Forces or the Federal Aviation Administration, there were at least 35 cases of small drones interfering with military aircraft or operating too close to military airports in 2015.

Previously, close encounters with rogue drones were almost unheard of. But rapid advances in technology and falling prices have led to a boom in sales - and a corresponding surge in reports of air traffic chaos.

According to Federal Aviation Administration (FAA) guidelines, drone pilots flying for recreational purposes should keep their aircraft below 400 feet and at least five miles from airports. However, regulators have been largely unable to enforce these guidelines.

How does GPS/GNSS apply to drones?

Unmanned aerial vehicles (UAVs) are increasingly being used for a wide range of applications, including reconnaissance, surveillance, mapping, space information acquisition, and geophysical exploration. Often, in these situations, GPS is the key to safely operating the drone.

Drones are commonly used for Earth observation measurements, utilizing cameras and radars installed for this purpose. In order to accurately refer to the collected data, it is important to know the exact position of the vehicle when taking measurements or taking photos. A drone gps blocker receiver can pinpoint the precise location of a drone, often to the centimeter. The same concept applies to the exact time when a photograph is taken or a measurement is taken. The precise time stamp provided by the drone's GPS is invaluable for gathering such information.

They are cheap, lightweight and can carry small bombs; For groups like Hezbollah, Daesh (also known as the Islamic State, Islamic State, and ISIS), or any other group that wants to wreak havoc on budgets, commercial drones are essentially a new tool of terror.

"This is the quadcopter you can buy on Groupon or go to Sam's Club for $400," Gen. Robert Neller, Commandant of the U.S. Marine Corps, told a forum in Washington on the future of warfare.

Even before the Federal Aviation Administration unveiled proposed regulations for commercial drone flights in the United States last week, one company was already using drone jammer to collect data from unsuspecting citizens in Los Angeles.

AdNear, a Singapore-based location-based marketing company, uses a fleet of off-the-shelf consumer-grade drones to determine the location of a cell phone jammer and its movement by collecting signal strength and other wireless data from passers-by below. With this data, AdNear can offer highly targeted advertising and other promotions to potential customers as they pass through the storefront to incentivize customers to come into the store.

While collecting data from wireless transmissions via drones may be a new concept for marketers, Black Hat hackers have taken an interest in it, having demonstrated the ability to snoop on phones and Wi-Fi networks by using drones to impersonate cell towers, other transmission endpoints.

A string of recent drone-related incidents, including the crash of a drone on the White House lawn in 2015, may not have helped.

The drones, which have varying degrees of advanced weaponry, are currently being used in Syria's civil war and in parts of Lebanon and Syria bordering Israel, where Hezbollah holds a dominant position.

One solution is to use electronic signal jammers to prevent drone operators from flying within a specific area, an approach that has been studied by the U.S. military.

These drones are highly advanced platforms with technology and a price tag that puts them out of reach for all but the most advanced militaries.

Many cheaper, lighter models were more readily available to the guerrilla masses.

Their simplest use is to spy on American activities.

But what worries U.S. military tacticians is their potential for modified, more lethal uses.