Page 813 miscellaneous 9132 



also be made for the thoroughness with which the region has been surveyed and charted. 

 If the surveys of the area are incomplete, if the harbor charts are on too small a scale, 

 or if a harbor has grown in importance, more detail will be required in the Coast Pilot. 

 The amount of detail required in describing various features in new editions is given 

 in 916. 



9132. Field Inspection for Coast Pilot Revision 



a. Purpose. — The principal purposes of a field revision are to verify and correct 

 all statements in the Pilot, to delete material no longer of value, and to add new worth- 

 while information. In addition to this, local deficiencies in the charts and suggestions 

 for their improvement should be obtained and reported to the Washington Office. 

 Arrangements should be made for local correspondents to inform the Office of all 

 future changes affecting navigation. 



b. Record.- — The reviser should enter in his Field Record Books all information 

 to be used in revising the Pilot, with authorities where practicable. All field entries 

 must be in ink of a distinctive color not used in these Records for any other purpose. 

 Reference may be made to charts for the purpose of clarifying or amplifying the text, 

 but not as part of the permanent record so far as the Coast Pilot Section is concerned. 

 The chart-sections that are prepared as a permanent record are filed in the Nautical 

 Chart Branch, and instructions for their preparation are given in 8521 and 91336. 

 Plans of completed or projected work should be obtained locally and submitted to 

 the Office (see 2361, 834, and 916, Blueprints and maps obtained locally). 



Corrections, information, etc., should be written, or securely pasted or clipped in 

 the blank spaces of the Field Record Book. The place in the text to which each entry 

 refers should be clearly indicated by a leader or arrow or in some other clear and 

 unmistakable manner. Clarity of meaning and definiteness are of supreme importance. 

 A vague statement may be misinterpreted and result in an error, or its clarification 

 may require laborious and time-consuming research or correspondence. 



c. Plan of work. — It is worth while for the reviser to outline an approximate 

 itinerary and plan before starting field work. Both road maps and general charts 

 should be used, and a system of inspection should be tentatively adopted; that is, 

 routes should be marked and the areas indicated for inspection by truck or boat. 

 If the cooperation of the United States Coast Guard has been obtained, a call should 

 be made on the District Commander to learn what areas can be inspected with the 

 use of his equipment. It will then be apparent where a chartered launch will be 

 required, and the necessary arrangements can be more intelligently made. 



The use of ferries, and trips on coasting vessels, fishing vessels, etc., should be 

 considered. 



d. Information required. — Information on a great varietj'' of subjects is required. 

 So far as practicable these have been listed in 916 in alphabetical order, with notes 

 to indicate and limit the amount of detail that should be obtained and published on 

 each subject. 



e. Sources of information. — Following is a list of organizations and officials who 

 should be interviewed for the purpose of obtaining local information. Recommenda- 

 tions as to persons to be interviewed in an area should be obtained, if possible, before 

 arrival there. Information from these, as well as from other sources, must be checked 

 by the reviser. An actual inspection should be made in all cases where practicable. 



