The combat shelter for a machine gun and an anti-tank gun at the main position of the Jastarnia Resistance Center was a solid defensive structure. Construction work began on May 15, 1939, originally planned to be completed by September 15, 1939. However, due to the outbreak of World War II, finishing works continued until the capitulation of the Fortified Region of Hel. Due to difficulties in camouflage arising from its location, the shelter was reinforced with external walls ranging from 125 to 330 cm in thickness. Additionally, 25 mm thick armor plates were applied to the walls, significantly increasing its resistance. The shelter's armament included two heavy machine guns. One of them was placed in an armored dome, allowing for firing in the frontal sector, targeting objectives on the beach and dunes. Three firing ports enabled effective use of the weaponry. The second heavy machine gun was intended for firing in the direction of the sea. Despite plans to equip the facility with an armored dome with a 37 mm anti-tank gun, it was not delivered to Hel before the outbreak of the war.