INDEX 



Page 909 



Reference 

 No. 

 Homogeneity of sea water 



Conditions for 622 



Occurrence of 622 



Hooke 47 



Hook, special, for weighing buoys 2852 



Horizon closures in triangulation, require- 

 ments 223 



Horizon distinctness important in astronomic 



observations 3384 C 



Horizontal control {see Control, and specific 



type of station) 

 Horizontal control (of hydrographic surveys) _ _ 33 



accuracy. 332 



Definition 33 



Especially accurate 334 



Large-scale survey by three-point fixes. _ 3341 



Large-scale survey requirements 334 



methods 332 



methods, special 3323 



positions by difTerent methods, diSerence in_ 361 

 Horizontal datum (see Geographic datum) 



Horses, use by shore parties 1351 



Hospitals, Marine, listed in Coast Pilot 916 



Hours, numbering in Sounding Record 8142 



f527 

 Hughes and Son, Henry.- -{gjs 



Echo-sounding instruments manufactured 



by : ^. . 532 



Hughes MS 12 D {see MS 12 D, Hughes) 



Hunting, definition 5243 



Huygen's construction for reflected waves 6221 



Hydrographer 

 Duties, extracurricular, of hydrographic 



party 38 



responsible for Sounding Record 818 



ResponsibUity in dangerous waters.. 361 



Term as used in this Manual 114 



Hydrographic 

 data, miscellaneous, indexed in Sounding 



Records 819e 



data of other organizations compared with 



smooth sheet 9345a 



launch {see Launch, survey) 



Manual, content 114 



operations 34 



positions {see Positions, hydrographic and 



Three-point fix) 

 sheet(s) {see also Boat sheet and Smooth sheet) 



(3112 



Depth unit, one only to a -^771 



[7716 



{J01 

 733 



Data furnished field party 131 



index 8413 



limits given in Descriptive Report 842B 



junctions given in Descriptive Report 842B 



orientation 1362 



(1365 



printed from air photographic surveys <2392 



[7333 

 projected from air photographic surveys. .. 7334 



Size, maximum, of 1363 



Size, standard, of 1363 



Transmittal 836 



signals {see also Signal building; Signal cloth; 

 Signals; and Whitewash) 



along indented coasts 2341 



along sand beaches 2341 



Appearance to be varied (Ifs 



Cliffs, placing on 2461 



(271 

 Colors of ...•^272 



l275 



Definition 2116 



Distance visible. 272 



facilitate hydrography if properly built 2341 



Frequency requirements 242 



General description 271 



Graphic control survey to locate 237 



Height and size 272 



Inaccessible shoreline, locating along.. 2461 



Launch surveys, for 271 



placed advantageously for hydrographer's 



use 234 



placed to providestrong three-point fixes 234 



Planetable location of 234 



Sunlight, faced to reflect. 271 



Refraction effect on visibility of 272 



Signal notices posted on 271 



Spacing requirements 2341 



Tall {see Signals, 40-foot hydrographic 



and Signals, 98-foot hydrographic) 



Page 



560 

 560 

 400 

 188 



75 



242 



211 

 215 

 212 

 223 

 223 

 223 

 215 

 216 

 277 



22 

 833 

 762 

 495 

 498 



476 

 561 



296 

 769 



276 



S 

 250 



192 



714 



715 



16 



674 



16 



787 



787 



787 



25 



26 



100 



675 



675 



25 



25 



785 



92 

 92 

 92 

 161 

 106 

 153 

 154 

 160 

 61 

 154 

 92 

 104 

 152 

 95 

 154 

 107 

 152 



91 

 92 

 91 

 152 

 154 

 153 

 92 



Hydrograhic— Continued. Reference 



signals — continued. '^^• 



Targets arranged to reflect sunlight 271 



Temporary' nature of 2341 



Types 271 



stations {see also Control stations) 



Accuracy requirements 244 



Air photographic surveys, percentage 



located by 2393 



Classification 2115 



Definition _ {|J^5 



Description 245 



located by 



air photographic survey 2392 



Percentage available 2393 



Symbolization 2392 



planetable traverse, symbolization 2393(6) 



planetable triangulation, symbolization. . 2393(c) 

 sextant angles from air photographic 



stations 2393((f) 



Requirements 2393 (d) 



Symbolization 2393((i) 



sextant angles from other control stations. 2433 



sextant angles from vessels (2432 



Symbolization... 2393(e) 



sextometer 239S{g) 



Limit of use 2.393(9) 



Symbolization 2393(9) 



three-point fix at station 2431 



located with reference to detail on photo- 

 graphs 2.394B 



planimetrie map detail 2394 A 



Locating in inaccessible places 246 



Location methods 243 



Marking 245 



names, length of 2151(2), 



names to be taken from list {list) 965 



not used in locating other stations 241 



Observations to locate , records 248 



Records of observed data 248 



relocated by other more accurate methods. . 241 

 supplementing those located by 



air photographic surveys 2393 



topographic surveys 242 



(2392 



Symbolization <241 



1743(c) 



Where needed 241 



survey (s) 



.\ccuracy ■ 1126 



Additional field work recommended . 9348/ 



(31 

 .3246 



Adequacy -^35 



355 

 l36 



discussed in Descriptive Report 842^ 



reported in review 9348Q 



.\djoining (.see also Junctions) 



Comparison required 788 



identified on smooth sheet 9335 



in disagreement 3132 



limits omitted from smooth sheet in field. 788 



overlap requirements 3132 



Transfer of soundings 9335 



Approval by administrative officers 935 



Approval by C hief of Party ./^^ J 



Basic . description 351 



Buoy-control , statistic of 258 



By-products of 1134 



Completed , review by hydrographer.. 3257 



Contemporary , junctions with 3133 



controlled astronomically, records required. 8313 



controlled by buoys, records required 8.32 



controlled by transit shore observations 3342 



controlled partly on board and partly on 



shore 3343 



controlled wholly or partly from shore 3323(a) 



Controlling {see Horizontal control) 



data submitted by areas {list) 8351F 



datums 2171 



Day's work, identification of 3311 



Definition 31 



Depth curves, to warrant drawing 



continuous 353 



development {see Development) 



discrepancies corrected in field . 79 



errors corrected in field 79 



Exploratory 3941 



Features to be named on 161 



field numbers 1541 



Horizontal control of ^^ {see also Horizon- 

 tal control) 33 



Method identified in Descriptive Report. 8427 



(3) 



152 

 92 

 152 



101 

 61 

 61 

 103 

 106 



100 

 101 

 100 

 101 

 101 



101 

 101 

 101 

 105 

 101 

 105 

 101 

 102 

 102 

 102 

 104 



102 

 102 

 106 

 104 

 106 

 64 

 887 

 103 

 109 

 109 

 104 



101 

 104 

 100 

 104 

 688 

 103 



191 

 209 

 267 

 272 

 275 

 788 



747 

 852 

 195 

 747 

 195 

 852 

 860 

 250 

 792 

 267 

 146 

 7 

 211 

 195 

 779 

 779 

 224 



224 

 216 



785 



68 



212 



191 



270 



747 

 747 

 309 

 47 

 39 



211 



788 



