The non-trigger fuze, fuze and deactivation device of Cirkel 400 submarine mine are located in the instrument cabin at the top. My structure is simple. But it is suitable for attacking large and medium-sized surface ships in different depths.
Siegel 400 submersible mine has a height of 850 mm, a bottom diameter of 980 mm, an upper diameter of 700 mm, a total weight of 535 kg and a charge of 400 kg. The fuze is a non-trigger acoustic fuze.