Heavy fighting shelter, designed for machine guns. The construction of the shelter launched on 15 May 1939 and by the outbreak of World War II, he received combat readiness, but the finishing work lasted until the capitulation of Hel Fortified Zone. The thickness of external walls: 100-180 cm. The thickness of armor in the walls of 25-120 mm. Thickness of 180 mm tank dome. Arming the shelter consisted of two HMG-s. One was placed in the dome of the tank, with the possibility of fire for three shooting. Range allowed to support neighboring shelters, "Sabala" and "vulture". The second was intended for machine guns firing oblique along the dirt road. In addition, the defense could be carried out by four shooting ranges used for firing light machine guns. The entrance to the building was defended by two internal shooting. During the night the enemy action dunes were lit by flares fired from rocket launchers by a special and armored searchlight illuminated the path hidden in a recess in the side wall. In addition to space warfare facility were: the crew quarters, storage, toilet, engine (diesel generators, air filters and akumulatorownia. To protect against chemical weapons were kept in the shelter hypertension.
