9338 HYDROGRAPHIC MANUAL PaGE 854 



be dispatched either by registered mail or by special messenger (see 125). The file copy 

 of the transmitting letter shall state the method of forwarding. 



9338. Miscellaneous 



All aids to navigation should appear on the hydrographic sheet. The cartog- 

 rapher should see that all located by triangulation or topography or appearing on 

 contemporary hydrographic or wire-drag surveys are plotted or transferred. 



The cartographer verifying the survey should supply such deficiencies as can be 

 done in the Office. Certain steps in the construction and field plotting of smooth sheets 

 are required to be checked (see 746). If there is no evidence that this has been done in 

 the field, it shall be done by the verifier. 



The instructions of the Hydrographic Manual specify that corrections for reducing 

 soundings shall be entered to closer limits under certain conditions (see 8143 and 822) 

 and the verifier shall verify that this requirement has been complied with. 



Pencil notations and temporary marks of all kinds, except place names, on regis- 

 tered hydrographic and topographic survey sheets, must be removed by the cartogra- 

 pher before the sheet leaves his custody. Temporary notations are necessary in some 

 phases of the verification and review of a survey, but these must be removed before the 

 sheet is returned to the files. If a temporary record is necessary, such record should 

 be made as a note on an attached sheet of paper or on a tracing of a section of the sheet. 

 Although the registered air photographic survey is a photolithographic copy, it is the 

 registered copy and should be treated with the same care as other original sheets. 

 Copies of these, printed on chart paper, may be obtained from the Distribution Branch, 

 on which any required notations may be made. 



9339. Written Report 



The verifier shall prepare a critical report on the survey, using Form M-996, Veri- 

 fier's Report of Hydrographic Survey No. H- . . . ,for this purpose. This form provides 

 a check list to ensure that the verifier omits no phase of his work, and provides space 

 for comments as to the quality of the field work and office work on the survey, and space 

 for*calling the reviewer's attention to any facts about which he should be informed. 



All written references to registered hydrographic or topographic surveys shall in- 

 clude the year of the survey in addition to the registry number, thus: H-3574 (1907). 

 (See 1543.) 



The written report is primarily for the use of the reviewer. Such comments as he 

 believes are of permanent value shall be included in the written review, after which the 

 verifier's report is removed from the Descriptive Report. 



The Office statistics shall be prepared on Form M-1683-1 and added to the De- 

 scriptive Report. This includes the names of the verifier and reviewer, the time spent 

 by each in his verification and review, and indicates by certain statistics the amount of 

 revision that had to be made to the sheet during verification. (See 844.) 



934. Review of Hydrographic Surveys 



The purpose of verification is to verify certain phases of the office work done on 

 hydrographic survey sheets in the field or at a Processing Office and to correlate con- 

 temporary survey records of the Coast and Geodetic Survey and ink the sheet as a 

 complete contemporary record. 



