Previous: B-46: Restrictive Fire Line
B-47. FPL is a line of fire established where an enemy assault is to be checked by the interlocking fires of all available weapons. The unit reinforces this line with protective obstacles and with final protective fires whenever possible. Initiation of the final protective fires is the signal for elements, crews, and individual Soldiers to shift fires to their assigned portion of the FPL. They spare no ammunition in repelling the enemy assault, a particular concern for medium machine guns and other automatic weapons.