A German World War II-era coastal artillery bunker located in northern Norway. The designation 'OB' likely refers to 'Oberbau' or a similar German military construction classification, and '15,5cm Geschütz' indicates its primary armament was a 15.5 cm naval or coastal gun. This structure was part of the extensive German fortification efforts in occupied Norway, integrated into the broader Atlantic Wall defensive system to protect strategic coastal areas and naval routes.
Based on its type and location, the bunker would have been designed to engage Allied naval vessels and provide long-range fire support. The gun emplacement would have been heavily fortified with reinforced concrete to withstand counter-battery fire. Such positions were typically crewed by Kriegsmarine or Heer artillery units and formed a key component of Germany's northern defensive perimeter during the war.