That's because a new memo from Deputy Defense Secretary Patrick Shanahan prohibits the use of GPS-enabled devices - including wearable fitness trackers and smartphone apps that can track your location - in deployed settings, the Department of Defense announced Monday.
The move to increase troop security comes in part as a response to exercise-logging company Strava publishing a map compiling its users' activity.
Specifically, their use can be authorized after "conducting a threat-based comprehensive Operations Security (OPSEC) survey" or if the use of geolocation on government-issued devices is necessary to carry out a mission.
The change comes more than seven months after an worldwide security student, Nathan Ruser, reviewed information released by the GPS tracking company Strava and discovered that a "global heat map" it provided could be used to map the locations of USA troops and other security forces overseas.
The devices themselves will not be banned.
Defense personnel who aren't in sensitive areas will be able to use Global Positioning System applications if their commanders conclude it doesn't pose a risk.
"We don't want to give the enemy any unfair advantage", Army Col. Rob Manning, a Pentagon spokesperson, told reporters on Monday.
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"Zooming in on one of the larger bases clearly reveals its internal layout, as mapped out by the tracked jogging routes of numerous soldiers", The Guardian reported at the time. As CNN noted, the rule would apply to a wide range of products and apps including fitness trackers, smartphones and potentially even dating apps.
The Pentagon immediately launched a review, noting that the electronic signals could potentially disclose the location of troops who are in secret or classified locations or on small forward operating bases in hostile areas.
This is the second memo affecting the use of cellphones and other electronic devices that the department has released in recent months.
That memo allowed cellphones to still be used in Pentagon common areas and offices, but made clear the current practice that requires phones be left in daily-use storage containers located outside the secure spaces where sensitive or classified materials are handled or discussed.
Military commanders will be able to make a judgment call on when troops can power up their smart devices, depending on the status of their operation.
Military officials are set to create risk management guidelines and new training for those devices within 30 days, the report said.