Taking Cover in Tom Clancy's The Division.

When engaging in combat, you can have your JTF agent take cover behind various objects. This provides them with a safe place to do some quick healing or to hatch a plan with team members.

By moving to the edge of your present piece of cover, you can see a trail leading to the next nearest piece of cover. This is shown with a thin golden-yellow line. This line will, when you hit the A or X will have the Agent duck from their present cover location to the next. This can be very helpful to get closer to foes without having to break from cover