Following the discovery that a fitness app had been revealing sensitive intel about the location of major U.S. military bases, the Pentagon is issuing a ban on such technology for deployed U.S. military personnel.

"Effective immediately, DoD personnel are prohibited from using geolocation" apps and features, Deputy Defense Secretary Patrick M. Shanahan wrote in a memo.

"The rapidly evolving market of devices, applications, and services with geolocation capabilities presents significant risk to Department of Defense (DoD) personnel both on and off duty, and to our military operations globally," the memo continued.

Whether domestic military personnel can still use GPS and other related technology will be for commanding officers and others in military leadership roles to decide. Such technology can be found in a host of devices including smart watches, cellphones, tablets and fitness trackers.

"These geolocation capabilities can expose personal information, locations, routines, and numbers of DoD personnel," Shanahan wrote, "and potentially create unintended security consequences and increased risk to the joint force and mission."

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