270 



INDEX 



Section No. 



Datum (s) 



geographic 6—102, 6—103 



tidal 1^5,5-102,6-25 16, 



Day letter (s) 



assigrning 1-31, 5-35 



colors 1—31, 6-51 



Inking — on smooth sheet 6-51 



size 6-51 



Dead reckoning 5-130 



Decimals 



smooth sheet, use on 6-55 



sounding record, use in 1-38, 5-101 



Deep sea features, terminology 7-17B 



Deficiencies 



of surveys 1-56 



of smooth sheets 6-74 



Depth (s) 



comparison with prior surveys 6-99 



curves 



Abnormal — disclose survey 



faults' 5-64 



boat sheet 1-41, 5-65 



color representation. Standard — 1—41 



delineation 5-64 



Inking — on smooth sheets 6-63 



penciled by smooth plotter 6-63 



supplemental 1-41, 6-64 



verification and revision 6-88 



differences 6-61 



allowable— 5-73 



at crossings 5-73 



at junctions 5-74 



field investigation required 5-75 



measurement ( s ) 



accuracy requirements 5-18 



methods, approved 1-35, 3-63 



units 



Atlantic Ocean 1-38 



conversion 5-123 



for various depths and conditions 1-38 

 One — only on one 



hydrographic survey 1-38, 5-30 



Pacific Ocean 1-38 



rules for various depths and 



instruments 1-38 



Descriptions 



bench marks 2-51 



recoverable topographic stations , 4-25 



triangulation stations 4-5 



Descriptive report(s) 



abstract of corrections to echo 



soundings 7-8 



additions at the Washington Office 7-13 

 application to chart, record of — 7-13(c) 



approval sheet 7-11 



contents, sequence of 7—4 



cover sheet (Form 504) 7-1 



distance measurements, corrections 



to . - - . 7-9 



daily journal by hydrographer 7-1 



dangers, tabulation of 7-4K 



geogrraphic names list 7-7, 7-13(a) 



index of sheets 7-3 



junction discrepancies 6-73 



Processing Office notes 7-12 



purpose 7-1 



required for each survey sheet 7-1 



review report 7-13 (e) 



shoreline revision explained 7-4G 



signals, list of 7-10 



statistics sheet 7— 4N 



tide note (Form 712) 7-6, 7-13(d) 



title sheet. 7-2 



Page, 



235, 236 

 174, 207 



10, 143 



10, 217 



217 



217 



198 



219 



13, 173 



248 



19 

 227 



234 



154 



15, 154 



15 



154 



223 



223 



15, 223 



230 



221 



158 



158 



158 



158 



136 

 12,69 



13 



192 



13 



13, 142 

 13 



13 



38 

 119 

 113 



244 

 245 

 245 

 245 

 242 

 241 



244 

 241 

 243 



244, 245 

 241 

 226 

 245 

 241 

 241 

 245 

 242 

 244 

 243 



244, 245 

 241 



Section No. 



Descriptive report(s) (continued) 

 topographic survey 



verifier's report (Form 946A). 

 Detached position(s) 

 check angle required- 



_ 4-23 

 _7-13(b) 



Plotting — on smooth sheet- 

 verification of . 



_4-26, 5-80 



6-46 



6-85 



Details on smooth sheet, inked or 

 penciled (Table) 



Development, hydrographic 

 Boat sheet marked for — _ 

 congested 



of shoals and dangers, general 



requirements 



procedure described . 



6-16 



5-51 

 1-28 



1-28 

 5-69 



Differences in depths, (see Depth 



differences) 

 Discrepancies 



at crossings 



at junctions and overlaps 



between topogrraphic and 



hydrographic data 5-67, 6-89 



in hydrography 5-75, 6-61 



Distance arcs 



5-73 

 5-74 



Compensation for distortion 



when drawing — 



general discussion . 



1-20, 5-11 



1-20 



intervals, related to scale of survey 5-12 



methods of drawing 5-11 



use on smooth sheet 6-11 



"Dog ear(s)" (sheet extensions) 



use on boat sheets 2-24 



use on smooth sheets 6-5 



Drafting 



Character of — on smooth sheets 6-12 



instruments, small . 

 beam compass 



care 



custody 



curves, plastic. 



lettering sets 



meter bar 



straight edges, steel, testing 



Draft of transducers 



Adjustment for — 



measurement of 



Dredges 



Dredging winch 



Drift soundings 



recording 



Time spent in- 



3-137 

 3-139 

 6-9 

 3-5 

 3-140 

 3-140 

 3-138 

 3-140 



5-109 

 5-106 

 3-131 

 3-113 



used to find least depth . 

 Duplicate boat sheets 



5-70 



5-70 



-1-28, 5-69 

 5-8 



E 



Echo(es) 



from grass and kelp . 



Side— 



Stray- 



-5-121, 5-122 



5-122 



-5-121, 5-122 



Echo sounding(s) (see also Fathogram) 

 Corrections to— 1-39, 5-100 



draft 



initial or index . 

 phase 



settlement and squat- 

 tide 



velocity (see also Velocity of 



sound, corrections) 



depth measurements by 



frequency of transducers 



in irregular bottom 



in kelp or grass 



irregularly spaced 5-63,6-59 



5-106 

 5-109 

 5-112 

 5-108 

 5-102 



5-114 

 1-35 

 3-102 

 5-121 

 5-122 



Paee 



118 

 245 



119, 161 

 214 

 229 



204 



149 

 9 



9 

 156 



158 

 158 



155, 230 

 158, 221 



7,129 



7 



132 



129 



202 



28 

 201 



203 

 107 

 107 

 202 

 44 

 108 

 108 

 107 

 108 



178 



176 



102 



92 



157 



157 



9,156 



129 



188, 189 



189 



188, 189 



13, 173 

 176 

 178 

 180 

 177 

 174 



181 



12 



86 



188 



189 



153, 220 



