This gun battery was built by the German Army and consisted of 3 210 mm howitzers. The guns were placed on open concrete ring positions with ammunition bunkers located around them. Bunkers were also built to protect the gun crew.
The gun positions were located on the fields north of the church in St. Quen. The associated observation and fire control equipment were installed in the old mill that lay just west of the church. The mill had a new concrete floor installed.
Today, two of the gun positions, the old mill and several of the crew and ammunition bunkers remain where there have since construction 75 years ago.
The guns were thrown over the cliffs at Les Landes, which was common practice in Jersey and still to this day lie at the foot of the cliffs.