110 NAUTICAL CHAKT MANUAL 



COMPILATION REVIEW 



The compilation review, an exhaustive study and inspection of the compilation, is made 

 for the following reasons : 



1. To ascertain that all existing infoimation pertinent to the chart has been considered. 



2. To assure that only those sources which most clearly define existing conditions have 



been used. 



3. To determine that the material used has been properly generalized. 



4. To assure that all symbolization conforms to standard practice and that aU prominent 



objects and aids to navigation have been accurately plotted. 



5. To make an artistic appraisal and, if necessary, a recommendation for the rearrange- 



ment of such features as geographic names, notes, or compass roses. 



6. To assure that the chart is so compiled as to be most useful to the mariner. 



Upon assignment of a chart Compilation, the reviewer receives a Specification sheet and 

 History sheet. The former defines the title, limits, sounding unit, depth curve and contour 

 interval, while the latter contains a list of all source material applied to the chart by the car- 

 tographer. The reviewer evaluates and verifies the compiler's selection of the critical and 

 essential information shown on the chart. At the same time, the History sheet is checked, so 

 that upon completion of the review, it becomes a record of all data pertaining to the chart 

 Compilation. 



Three qualities of a good Compilation are accuracy, completeness, and clearness. Accuracy 

 is of prime importance. The plotting of all fixed aids to navigation, landmarks, wrecks, and 

 obstructions should be checked from their geographic coordinates. All soundings should be 

 checked for value, and their location should be true within half the width of the figure. 



Check all sectors, ranges, measured mUe courses, and grid systems as well as dredged 

 channels, anchorages, spoil areas, dumping grounds, cable, restricted and prohibited areas. 

 Buoys shall agree in position and characteristic with the Notice to Mariners upon which they 

 are based. 



