12-inch Mortars for close range work.  There were a total of 28 of these short range mortars within the defense areas of the coastal artillery.  Fort Amador (then Fort Grant) had 12 and were located at: Batteries Merrit, Prince and Carr (4 each) on Flamenco Island.  These batteries latter had Hawk Missiles during the Cold War years.  These old batteries were located at the base of Flamenco and could be seen when turning around at the end of the causeway.  Fort Sherman had 8 and were located at: Batteries Baird and Howard.  Fort Randolph had 8 and were located at: Batteries Tidball and Zalinski.