Page 859 miscellaneous 9349 



After a brief digest of the comparative findings, conclude with a definite statement 

 as to whether the prior survey is superseded or should be used to supplement the new 

 survey. In some cases it may be advisable to recommend retention of bottom 

 characteristics from the old survey. 



List wire-drag surveys under a subhead and state whether the new survey depths 

 are in harmony with the effective drag depths and whether any conflicts noted should 

 be investigated. Wire-drag surveys are never to be superseded by ordinary hydro- 

 graphic surveys. 



F. Comparison with chart. — Give number and print date of chart (see 1127) with 

 which comparison was made, and the results of the comparison (see 9345), under the 

 following subheads: 



a. Hydrography. — Include the results of 9345a. It may be advisable in some cases to recommend 

 the retention of such information on the charts. This paragraph, when miscellaneous matters are 

 considered, shall be concluded with a brief digest of the findings and a definite recommendation for 

 retention or discontinuance of the items considered. 



b. Controlling depths. — Include the results of 93456. A brief statement that the present survey 

 depths are in agreement or in conflict with the charted information will usually suffice. 



c. Aids to navigation. — Give the results of 9345c. Where the new survey discloses that an aid 

 in its official position is a menace rather than an aid to navigation, or a new unmarked danger is noted, 

 a definite recommendation should be made. 



G. Condition oj survey. — Under the subheads (a) field work, (6) Sounding Record?* 

 (c) Descriptive Report, and {d) field plotting, state briefly whether the condition 

 is satisfactory. Cases where the procedure is definitely wrong or fails to comply with 

 the requirements of the Hydrographic Manual should be specifically mentioned. But it 

 must be borne in mind that the Manual is infrequently supplemented or modified by 

 Field and Office Memorandums, and that improvements in survey methods frequently 

 result in procedures differing from those described in the Manual. The important parts 

 of the verifier's criticism that are found justified and should be called to the attention 

 of the hydrographer, should be included. 



H. Compliance with the project instructions. — A brief statement that compliance 

 with the instructions is satisfactory is usually the only comment required. 



/. Additional field work recommended. — A brief statement that the survey is com- 

 plete or satisfactory will apply to most surveys. Wliere further work is desirable, it 

 will usually consist of examination of shoal indications, disposal of discrepancies, further 

 development of outstanding oceanographic features, or elimination of holidays. 



J. Miscellaneous. — Under this heading include only matters that cannot be covered 

 under one of the other headings. If only one topic is included, the paragraph should 

 have an appropriate heading. 



K. Superseded surveys. — This paragraph is purely statistical. List all superseded 

 surveys fwire-drag surveys excepted), accompanying each with a notation as to whether 

 it is superseded "entirely" or "in part." 



9349. Inspection of Hydrographic Survey 



After the hydrographic survey has been reviewed, it is critically inspected by the 

 Assistant Chief of the Surveys Branch. The purpose of the inspection is to gain an 

 over-all picture of the survey with regard to coverage, delineation of depth curves, and 

 critical depths. The written review is examined to see that all pertinent facts have been 

 adequately and clearly presented; particular attention being paid to the recommenda- 



