6. THE SMOOTH SHEET 



233 



the soundings are inked in colored ink in 

 order to distinguish the new information 

 from the original survey information. Sup- 

 plementary information is added to the title 

 in the same color and the sounding records 

 are stamped "Additional Work." 



6-96 Review. — The purpose of the review 

 is to evaluate the basic quality of the survey 

 by comparison with prior surveys and estab- 

 lished standards for hydrographic survey- 

 ing and to consider the survey in its broader 

 aspects insofar as its application to the 

 charts is concerned. The survey is made 

 complete with reference to all information 

 on prior survey sheets which need to be con- 

 sidered for chart compilation except as spe- 

 cifically mentioned in the written review. 



There are three separate phases of review : 



(a) Inspection of the work done by the 

 verifier, checking anything important that 

 was not previously checked, and examining 

 critically any changes made by the verifier 

 to assure that they are justified; 



(b) Evaluation of the survey for compli- 

 ance with project instructions and established 

 standards for hydrographic surveys ; and 



(c) Determination of the adequacy of the 

 survey to supersede prior surveys and charted 

 information. 



Evaluation of the survey includes a com- 

 parison with prior hydrographic and wire- 

 drag surveys and charted information. Ex- 

 cept for data from the latter source, the 

 smooth sheet in its completed form shall 

 show in color all supplemental data which 

 are required to meet the standards of a 

 basic survey. In the event the survey is 

 deficient in accordance with the standards, 

 a recommendation for additional work shall 

 be made in the review report. 



6-97 Reviewer's inspection. — The re- 

 viewer shall make a careful detailed inspec- 

 tion of the smooth sheet, including verifica- 

 tion of new data added by the verifier. This 

 is done systematically by beginning at the 

 top of the sheet and inspecting all detail grid 

 by grid. Being experienced and familiar 

 with bottom configurations of various areas 

 the reviewer should immediately notice any 



questionable sounding, curve delineation, 

 crossing discrepancy, or other detail over- 

 looked during verification. Excessive differ- 

 ences at crossings shall be investigated for 

 the purpose of rectifying them or ascertain- 

 ing the probable cause and its possible effect 

 on other soundings. Depth curves omitted 

 or not drawn correctly to show the proper 

 delineation of the bottom should be added 

 or revised. Non-standard curves should be 

 added to emphasize bottom configmation. 

 The application of junctional soundings and 

 junctional notes shall be verified and depth 

 curves in the area of overlap shall be com- 

 pared for agreement. Where the project in- 

 structions require a junction with surveys by 

 the Corps of Engineers, U.S. Army, such 

 junctions are to be examined for adequacy 

 but the soundings should not be transferred. 

 Shoreline and other photogrammetric detail 

 shall be inspected for possible omission or 

 error and proper cartographic treatment on 

 the survey. Deficiencies in verification found 

 during the review should be called to the 

 attention of the verifier who should make 

 the required revisions. 



The reviewer should not hesitate to refer 

 to the sounding records when the obvious 

 need arises. On some surveys occasional 

 significant errors undetected since original 

 recording in the sounding volumes have been 

 found during review. Recording of least 

 depths on the more critical features and in- 

 terpretation of the bottom profile in grass 

 and kelp areas should be examined on the 

 fathograms. 



As the review progresses, each statement 

 in the descriptive report and in the verifier's 

 report should be considered and each para- 

 graph should be check-marked in red ink. 

 Where additional evidence has altered posi- 

 tive statements in the descriptive report, a 

 marginal notation citing the disposition and 

 authority or basis for disposition should be 

 lettered in red ink. 



6-98 Wire-drag comparison. — In the 



event that wire-drag surveys have been made 

 in the area, a comparison and correlation of 

 the two surveys shall be accomplished. Ex- 



