9322 HYDIIOGRAPHIC MANUAL PaGE 848 



the Light Lists, and other federal surveys and maps. Decisions of the U. S. Board on 

 Geographical Names are identified, and any alternate names found are listed. 



The geographic name list included in the Descriptive Report (see 8433) of each 

 hydrographic survey is checked against the set of chart standards and all names on 

 the list, whose spelling and application are exactly identical with the standard are at 

 once approved for inking. All others are investigated before approval, use being 

 made of the special report on geographic names submitted by the field party (see 163 

 and 856) ; or they may have to be submitted to the U. S. Board on Geographical Names 

 for decisions. 



9322. Title and Geographic Names Inked 



All names which have been approved on the geographic name list attached to 

 the Descriptive Report, are inlved in black on the smooth sheet by one person assigned 

 to that work, using a mechanical lettering set. At the same time the title is inked 

 on the hydrographic sheet, from information on the Title Sheet (8412), using a standard 

 form and template. The result of this procedure is that the prominent lettering 

 on all sheets is of equal quality and appearance. 



All names applied to hydrographic features are inked in slanting letters and those 

 applied to topographic features in vertical letters. Sizes of lettering are determined 

 by the relative importance of the features named. Wliere convenient, the names are 

 placed on the sheet as they appear on the chart, except that names are kept out of 

 the sounded area so far as possible. Any names which must be placed in the sounded 

 area are left in pencil until after the soundings have been inked. All names are inked 

 to be read from the south and as many as possible are lettered parallel to the lines of 

 latitude. Those which cannot be lettered in a straight line are lettered along a com- 

 pound curve — never a reverse curve. (See also 787.) 



9323. Verification of the Sounding Datum 



On receipt of the Sounding Records from the Library, the Division of Tides and 

 Currents checks the plane of reference for each tide station used in the reduction of 

 soundings. If the survey party, in reducing the soundings, has used a preliminary 

 plane of reference differing by more than 0.3 foot from the final adopted plane, a new 

 reduction of the soundings is made. If the plane used is found to be correct witliin the 

 defined limits, only a selected few of the reducers entered in each day's work are checked. 

 The reduction of the soundings is not ordinarily checked in the Office. 



Form 712, Tide Note for Hydrographic Sheet No , is filled out and forwarded 



to the Surveys Branch for insertion in the Descriptive Report in place of the original 

 tide note. (See 8432 and 844c.) 



To indicate that the plane of reference has been verified, an approval stamp is 

 impressed on the inside of the back cover of each volume of the Sounding Records. 



933. Verification of Hydrographic Surveys 



After a hydrographic survey has been received at the Washington Office, has been 

 registered, and the various steps mentioned in 932 have been completed, it is verified 

 and the soundings are inked by a cartographer. 



The verification of a hydrographic sm-vey consists of a thorough examination of 

 the survey data as submitted from the field to ensiu-e that all phases of the office work 

 have been completed in accordance with chapter 7 of the Hydrographic Manual and 



