RULES AND PRACTICES 21 



CABLE AREAS AND PIPELINE AREAS (Fig. 1) (P-7, -7a, -8, -8a) 



In general, only those cable or pipeline areas which have been approved for charting by 

 the Secretary of the Army shall be charted. These areas shall be shown on all charts which 

 are expected to be used for anchorage purposes. 



The limiting lines shall be charted in magenta and spaced 1,000 feet apart except on 

 small-scale charts where a spacing of that width would not be of sufficient prominence. 

 Areas shall be shown by symbol P-7a and labeled CABLE AREA or PIPELINE AREA 

 in magenta (black when the chart does not have a magenta printing plate) in a position 

 which will not obscure important hydrographic information. 



Oil, gasoline, and natural gas pipelines not presently charted, shaU not be charted unless 

 requested by the Corps of Engineers. 



Charting of transoceanic cable routes was approved in 1961 (CL. 742/61) as a possible 

 means of preventing service disruption and cable damage by commercial fishing operations. 

 Charting approval by the Secretary of the Army is not required. S3Tnbol P-7 is used for 

 such cable routes. 



SPOIL AREAS (Fig. 1) (G-13) 



Spoil areas are so designated on dredging sheets generally originating from Corps of 

 Engineers after-dredging surveys. They may, however, originate on private or other Govern- 

 ment agency surveys. These areas are for the purpose of depositing dredged material. The 

 hmits should be charted by a short-dashed line, (Fig. 1). All soundings and depth curves are 

 to be omitted, the area labeled "Spoil Area" and tinted in the darkest blue shown on the 

 chart. 



*When advised that a spoil area has been discontinued, it shall be so labeled and retained 

 on the chart until a survey showing results after final spoil deposit is available for charting. 



♦Comment: If Disposal Area designation is used, the above note may not be necessary. 



DISPOSAL AREAS (Fig. 1) (G-Gc) 



Disposal Areas are established or approved by the Corps of Engineers for depositing 

 dredged material where existing depths indicate that the intent is not to cause sufficient shoal- 

 ing to create a danger to surface navigation. Soundings and curves should be retained. Blue 

 tint should not be added. The following note should be placed within the area, in black: 



Disposal Area 

 Depths from survey of 



(Date) 



