M120

The M120 is effectively the upper floor of the M132; only the plotting floor. It required an adjacent personnel bunker for the crew instead. Two were constructed in Alderney, at M.K.B. Annes and M.K.B. Elsass. Both are open and accessible, and the Elsass example was connected to the interior of Fort Albert by a wooden lined tunnel, where the three 17cm naval guns were positioned. The turrets of both examples were removed with explosives post war, and some sources state that the example at Annes was used for demolition testing.