Norway’s Directorate for Cultural Heritage has begun a unique program of setting up signs to highlight historical landmarks – underwater. The signs will be placed in order to discourage vandalism and plundering. About 30 shipwrecks in southern Norway will get the familiar preservation sign from the directorate, to help divers appreciate – and respect – some of the country’s less obvious attractions. Signs will be placed at depths of 10-30 meters (33-98 feet), and will point out wrecks and cargo that are particularly vulnerable to plundering.