20 NAUTICAL CHART MANUAL 



CATALOG OF CHART NUMBERS 



A loose-leaf ledger is kept of all numbers, and letters used in place of numbers, which 

 have been used as designations for charts and miscellaneous maps of the Coast and Geodetic 

 Survey. It contains the title, scale and publication date of each chart, the dates on which 

 superseded charts have been canceled, dates on which the limits of charts have been changed, 

 and other pertinent information. 



This record is to be used when selecting numbers for new nautical and aeronautical charts 

 and miscellaneous maps. The numbers of charts which have been canceled for twenty years 

 or more may be used again if necessary. 



Cartographers should familiarize themselves with this record as it contains much useful 

 information. 



IV 

 Special Areas 



RESTRICTED (P-9a), DANGER (P-9, magenta), AND PROHIBITED AREAS (Figs. 1, 

 12, 13) (P-25, G-12, G-46) 



The outhnes of restricted, danger, and prohibited areas shall be shown in magenta and the 

 areas labeled RESTRICTED AREA, PROHIBITED AREA, etc., in accordance with the Code 

 of Federal Regulations classification. Each classification shall include the Code section 

 number, e.g., 204.15 and a reference to standard NOTE A (Fig. 13), e.g. "(see Note A)." 

 Regulations governing an area may be added in the form of a note, when advisable. 



A magenta screening (Fig. 1) shall be used, when necessary, to clarify overlapping areas. 



ANCHORAGE AREAS (Figs. 1, 13, 14) (P-12) 



The regulations for and descriptions of anchorage areas are pubhshed in the Code of 

 Federal Regulations. Areas shaU be shown by a soUd magenta hne on aU charts which are 

 expected to be used for anchorage purposes. Generally, they are labeled in the same manner 

 as RESTRICTED AREAS, etc. 



Anchorage regulations may be added in the form of a note on large-scale harbor charts, 

 when advisable (Fig. 14). 



SEAPLANE AREAS and ANCHORAGES (Fig. 13) (P-9) 



The limits of seaplane areas and anchorages are shown by dashed magenta Hnes and 

 labeled in accordance with the Code of Federal Regulations classification including, assigned 

 section number, e.g., 207.50 and a reference to standard NOTE A (Fig. 12), e.g. (see Note A). 

 Seaplane lanes are shown by dashed magenta lines and labeled SEAPLANE LANE A, etc., 

 including section number and reference as above. 



