Page 926 



INDKX 



Reference 

 Signal(s)— Continued. No. 



Day to indicate survey activities 1585 



Definition {^J}' 



Flag (see Flag, International Code) 



40-foot hydrographic , description 2722 



Launch hydrographic , spacing 212 



Night to indicate survey activities 1585 



98-foot hydrographic 



Construction 2721 



Materials required (list) 2721(B) 



Specifications 2721(A) 



Target, description of 2721 



Time required to build 2721 



Temporary (see Hydrographic signals) 



Transmitted (see Transmitted signal, 



echo-sounding) 



Tripod , ordinary 2723 



Sigsbee watercup, description 474 1 



Silt, definition __ 3845 



Silted areas 



depicted on fathograms 7831 



Descriptive Report requirements 7831 



Smooth-sheet representation 7831 



Washington Office to be notified 7831 



Overlay tracings, showing on 7831 



Simplex-Blud worth Fathometer 522 



acoustic units 52216 



Frequency, operating 52216 



amplifier, echo 5221a 



depth range g^^ 



Description j^^^j 



draft adjustment 5222a 



808 Fathometer compared with 5223 



fathogram paper 



depth scales 5221o 



Description 5221a 



travel speed 5221a 



Features, characteristic... 5223 



helical wire 5221a 



installation... 5221 



instruction book 52226 



keying circuit ----{5222" 



motor speed 5221a 



adjustment :___ 52226 



for velocity of sound 52226 



control 52226 



meter 52226 



tachometer 52226 



verification 52226 



operating cycle, description 5222 



operation.. 5222 



parts, principal 5221 



printer blade 5221a 



recorder cabinet 5221a 



Description 5221a 



parts 5221a 



recording mechanism 

 Description 5221o 



Principle of operation (^222" 



sounding rate 5222 



submersible unit 52216 



Description 52216 



installation 52216 



time measuring device 5222 



Simplex-Bludworth, Inc 522 



Simultaneous comparisons 

 Correcting 5521 



for settlement and squat 5521 



Definition 5521 



Fathogram, identification of on 5522 



Procedure in making 5521 



Record of 8332 



Requirements for determining instrumental 



error 5521 



Smooth sheet, showing on 7737 



Sounding Record, entering — in (gm 



Tabulation (example) 5522 



Tabulations for season 5522 



Sinker for detaching rod (4744I 



Sinking rates of bombs, determining (fislfi 



Sixth report of Board on Geographical Names 1671 



Size of sheets 1363 



Sketches submitted as chart letters 8521 



Skewed projection, disadvantages 1362 



Skifl, description and use 4243 



Page 

 45 

 60 

 152 



IK 

 61 

 45 



154 

 155 

 155 

 155 

 155 



156 

 409 

 301 



739 

 739 

 739 

 739 

 7.39 

 459 

 460 

 460 

 460 

 459 

 460 

 459 

 460 

 461 

 461 



460 

 460 

 460 

 461 

 460 

 460 

 461 

 460 

 461 

 460 

 461 

 461 

 461 

 461 

 461 

 461 

 461 

 461 

 460 

 460 

 460 

 460 

 460 



460 

 460 

 461 

 461 

 460 

 460 

 460 

 461 

 459 



511 

 511 

 511 

 512 

 511 

 782 



511 

 725 

 512 

 762 

 512 

 510 

 410 



648 

 649 

 52 



25 

 797 



25 

 327 



Reference 

 No. 

 Slope, bottom 

 corrections (see also Echo sounding correc- 

 tions, and Reflection of sound, bottom 

 slopes) 



in irregular bottom, applying S63 



Principle of applying ._ ._ 563 



Submarine canyons, difficulty of applying 



in 563 



to echo soundings (formula) 563 



Determination of not easy 563 



Echo-sounding errors caused by 563 



Reflections from _. 563 



Soundings on , errors in 774(j) 



Sloughs 



Control in (see Waterways) 



Definition 1682c 



Limit of sounding in 3123 



Small boat hydrographic party, personnel of... 142 



Smooth sheet (s) 7 



Adjoining (see also Junctions) 



Identification of 9335 



Transfer of soundings 9335 



(79 



Approval by Chief of Party .^7941 



[925 



Artistic not desirable 721 



Boat sheet 



compared with smooth sheet 9332 



Differences between the two 7671 



positions transferred to smooth sheet 7672 



Soundings on irregular lines from 3352 



Use in plotting smooth sheet (767 



Charted data to be compared with 9345 



"Circle" sheets (see also "Circle" sheets) 37 



Clarity, importance of 7913 



Cleaning surface 727 



Clean, to be kept 727 



Completed 79 



compared with boat sheet 7912 



compared with Sounding Records 7911 



inspected in Surveys Branch 9349 



covered while being worked on 731 



covers 761 



Creased at table edge, not to be 7311 



Custody of — — , at Washington Office 931 



datum (see Geographic datum, changing on 

 survey sheet) 



Datum, changed, marked on ._ 7362 



deficiencies found in the past 795 



deficiencies supplied by verifier 9338 



Definition 7 



Degree and minute symbol sizes 7323 



details 



in black ink (table S8) 792 



in colored ink (tablets) 792 



left in pencil by plotter (tablets) 792 



Smallest to be perfectly legible 721 



Various requirements 78 



Diameter, minimum, when rolled 796 



Disposition of , final 7 



distortion (see Distortion) 



Dog-ears on 7121 



Drafting and lettering on (see Drafting) 



Dry during plotting, to be kept 731 



Erasing from 727 



Erroneous soundings detected by verifier 9333a 



Flat during plotting, to be kept 7311 



Inked lines, removal of 727 



Inking soundings 933 



inserts 7751 



Inspection, final, of 791 



(79 



by Chief of Party -^7941 



l925 



by hydrographer 794 



by plotter 794 



Latitude and longitude numbers, size of 7323 



orientation 722 



paper (see also Paper, drawing) 711 



cut by sharp pencils 731 



furnished from Washington Office 711 



Identification of . 7112 



Seasoning _ 7115 



sizes (7112 



paper (continued) 



surface not to be marred 731 



Types 7112 



Pencil lines, removal of 727 



Pencil lines, paper not indented by 724 



f Permanent record 793 



Photographic copies of 721 



plotter (see Plotter, smooth-sheet) 



Page 



541 

 541 



541 

 540 

 540 

 540 

 540 

 726 



55 

 194 



29 

 657 



853 

 852 

 748 

 751 

 846 

 663 



850 

 711 

 711 

 226 

 204 

 711 

 857 

 286 

 748 

 666 

 665 

 747 

 748 

 748 

 859 

 666 

 698 

 667 

 847 



679 

 751 

 854 

 657 

 669 



749 

 749 

 749 

 663 

 733 

 752 

 657 



660 



851 

 666 

 666 

 848 

 727 

 748 

 748 

 751 

 846 

 751 

 751 

 669 

 663 

 657 

 666 

 657 

 658 

 659 

 657 

 657 



666 

 657 

 666 

 664 

 749 

 663 



