A military structure located near Saint-Omer in the Pas-de-Calais department of northern France, identified by the cryptic designation 'FA HWB'. The site lies in a region with a significant military history, particularly from the World Wars due to its proximity to the English Channel and historical front lines. The coordinates place it in a rural area, consistent with many dispersed military and support facilities built during the 20th century.
While the provided web search results discuss France's broader nuclear weapons program and deterrence policy ('dissuasion avancée'), they do not contain any specific information linking this particular site or its coordinates to that program, to any known bunker type, or to a confirmed historical function. Therefore, the exact nature, purpose, and era of construction for this structure cannot be determined from the available data.
The location is catalogued based solely on its provided geographic coordinates and designation. Further local archival research or on-site verification would be required to confirm its historical role, whether it relates to Cold War infrastructure, earlier 20th-century fortifications, or another military purpose.