72 NAUTICAL CHART MANUAL 



KELP (O-20) 



Kelp generally grows in areas of rocky bottom, and in exposed waters it is found in depths 

 as great as 10 fathoms. The presence of kelp is an indication that submerged pinnacle rocks 

 may exist in the area. 



In general, the word "Kelp" is used in place of the kelp symbol, which is used only in smaU 

 areas. 



TIDE RIPS (0-18) 



The words "Tide Rips" shall be used in place of the symbol. 



MARINE ACCIDENT FILE 



In 1954 a special file of nautical charts was established for use in connection with marine 

 accident cases or wreck investigations. Upon receipt of information of an accident, three 

 copies of the appropriate charts at the time of accident are placed in this file and retained for 

 five years. 



DANGER TO NAVIGATION REPORT 



The Coast and Geodetic Survey poUcy for the disposition of a report of a grounding or 

 other danger to navigation is best explained by reference to the flow diagram, page 73. In 

 general, the routing of a report is as follows: 



1. A danger to navigation report received by, or originating with, the Coast and Geodetic 

 Survey in the field is immediately forwarded (generally by radio) to the afl^ected Coast Guard 

 District Office for publication in the local Notice to Mariners and for broadcasting over radio to the 

 boating pubhc. Our commanding officer in the field also notifies (generally by telegram) 

 Bureau Headquarters in Washington, D.C. 



2. Immediately upon receipt of a danger to navigation report in our Headquarters, the 

 report is routed through the Office of the Director and the Assistant Du'ector for Cartography, 

 to the Office of the Chief, Nautical Chart Division. This Division Chief then requests an 

 evaluation by the Operations Officer; Chief, Hydrographic Branch; and Chief, Nautical Data 

 Branch. Upon receipt of the results of this evaluation with recommendations, the Division 

 Chief makes the decision as to how the reported danger would be charted. In accordance with 

 this decision, the Chief, Aids to Navigation Section writes an article for insertion in the Notice 

 to Mariners. A copy of the danger report, with a notation as to how it will be charted, is for- 

 warded with recommendations from the Chief, Nautical Chart Division, through the Assistant 

 Director for Cartography to the Assistant Director, Office of Oceanography, for consideration 

 of a field investigation of the reported danger. A copy of the report is also sent to the Coast 

 Guard for consideration of aids to navigation. Another copy is furnished the Corps of Engi- 

 neers for consideration of removal of the danger. 



