Mariners occasionally discover shoals, sunken derelict vessels, miscellaneous debris or damaged bridge fenders which could endanger other navigators. Upon discovery of such potential hazards to navigation, mariners should immediately report them to the nearest Coast Guard unit and the U.S. Army Corps of Engineers providing as much of the following information as possible:

• Description of the Obstruction
• Location in latitude and longitude (Reference chart used)
• Depth of water over obstruction, if submerged
• Reporting vessel and observer name
• Time and date that the observation was made