Photograph as originally submitted to this page in the Historical Marker Database www.HMdb.org. Click on photo to resize in browser. Scroll down to see metadata.

Photographer: Don Morfe
Taken: July 7, 2009
Caption: Setting A Deadly Obstacle Course Marker
Additional Description: Photo captions:
Left: This schematic shows an underwater mine and distribution box, with buoys that were placed during planting operations. Throughout the modern era of American harbor defenses (1890-1950), mines were considered to be one of the primary harbor defense weapons.
Middle: Soldiers inserted explosives into the mines in these loading rooms, Extreme care was taken to ensure that no accidents occurred.
Right: Defense of the Golden Gate required extraordinary measures over the years. During World War II, strategically placed underwater mines deterred enemy surface ships and submarines.
Submitted: February 18, 2013, by Don Morfe of Baltimore, Maryland.
Database Locator Identification Number: p234616
File Size: 2.804 Megabytes

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