Page 986 



INDEX 



Topographic Continued. Reference 



sheet(s)— continued. '^"' 



numbers (see Field numbers and Kepistry 



numbers) 

 Office work required at Processing Offices. . 9242 



Office work required of field parties 9232 



projections, accuracy requirements 232(a) 



Projection used for - - 7321 



Tracings of used on both boat and 



smooth sheets 3224 



station(s) 



Accuracy requirements. - 232 



f211 

 Classification of --- - >2114 



Definition . 2114 



located by planetable 231 



located by unconventional methods, report 



required 2313 



names, length of 2151(2), 



Recoverable 235 



Definition 2114 



descriptions. 2351 



transmitted by surveys 854 



Marking 235 



Natural features and structures substi- 

 tuted for marked 235 



Purpose 235 



Recovery of 2351 



Reportof 2351 



Sketch of immediate vicinity 2351 



Spacing requirements for 235 



symbolization 743(ft) 



survey(s) 



Definition . . : 23 



elevations to be of the ground 382 



Form-line from ship ._. 382 



in advance of control 392 



Instructions for 1213 



Location of hydrographic signals 234 



Methods, special 238 



Methods, substitute : 238 



Projectionless 392 



Report of new methods used 2313 



requirements 232 



scale requirements 232 



Value of 1134 



Topography 23 



Townet, for collecting plankton 478 



Tracing(s) 



cloth 7141 



distortion •-.__ 7141 



distortion (table S3) 7141 



dusted with talc before inking. 7141 



General description 7141 



Grease, removing from 7141 



sizes available --- 7141 



Type most satisfactory 7141 



Overlay {see Overlay tracings) 



Topographic sheet 



Disposal 7561 



made daily for hydrographer's use 234 



paper 7142 



Dead-reckoning plots, used for 7652 



Description, general.. 7142 



distortion {tablets) 7114 



Make of most satisfactory.. 7142 



Preparation of for transferring detail . . 7561 



print s of air photographic surveys 7331 



transfer, control stations plotted by 7413 



transfer method, description 7561 



uses - 7142 



widths available 7142 



Track while sounding indicated on boat sheet. . 3252 

 Transceiver (see also under name of specific 

 instrument) 



Definition 5241 



location, importance of 541 



Transfer of detail from photographs to maps. .. 2394B 

 Transmission line clearances 



Coast Pilot requirements 916 



to be shown on smooth sheet 78466 



Transmission of sound (see Sound propagation 



and Sound transmission) 

 Tranmitted signal, echo sounding (see also 

 under name of specific instrument) 



SOSFathometer 5545 



increased on 312 Fathometer for use in deep 



water 581 



Lag in registration 556 



Effect on soundings 556 



registration 554 



Separation of acoustic units, effect on - 556 



Transmitting letter, copy with shipment lo^g 



Transmitting unit(s) , acoustic (see also Acoustic 

 units) 



(3) 



Page 



845 



844 



90 



667 



205 



60 

 60 

 60 

 89 



89 

 64 

 92 

 60 

 93 

 804 

 93 



93 

 93 

 93 

 93 

 93 

 93 



298 



297 



308 



10 



91 



95 



95 



308 



662 

 662 

 659 

 662 

 662 

 662 

 662 

 662 



695 

 91 

 662 

 708 

 662 

 659 

 662 

 695 

 674 

 686 

 695 

 662 

 662 



474 

 503 

 103 



824 

 742 



552 

 525 

 525 

 514 

 525 

 211 

 786 



Reference 



Transmitting unit(s)^Continued. No. 



Classes - . .^ ,, 



draft (see Draft of acoustic units) 



Function 5161 



installation 5161 



Semiportable ^— 5161 



Traverse(s) 



Buoy (.?ee also Taut-wire measurements) 



adjusted for closure error 

 Geographic-position method (ejramp/e). . 9441 



Plane-coordinate method 9442 



f9441 

 closure errors 19442 



Correcting azimuths for scope 9432 



Correcting distances for scope 9431 



Geodetic 



not to be substituted for triangulation 2284 



Requirements for 223 



Planetable 



accuracy requirements 232(e) 



adjustment 232 



listed in Descriptive Report 232 



station(s) 



Deflnition(s) 2113 



symbolization {743(a) 



Wire substituted for stadia 2381 



Trees, evergreen, floating, substituted for con- 

 trol buoys 2551 



Trench, definition 16816 



Trial positions (see Positions, hydrographic, 



trial, and R.A.R. positions, trial) 

 Triangle computation, where only the lengths 



of three sides are known 2532 



Tiangle of error, graphic, allowable discrepancy. 232(d) 



Triangulation 22 



Adjustment, continental 2171 



Angles, concluded, in 2211 



Coastal 



Distances measured to shorline 227 



Frequency requirements 2231 



11212 

 Spacing requirements 12231 



closures, poor, causes of 2213 



Computation method 22 



Computations, field 2211 



Connection with prior 2211 



expansion, provision for 221 (17) 



Expedition of in hydrographic surveys. . 2213 



First-order , requirements (table 3) . . 223 



Instructions for 1^2 



needed in advance of other operations 1341 



observations 

 Discrepancv, allowable, at scheme junc- 

 tions '(table 3) 223 



Horizon closure, requirements (tabk 3) 223 



Initial settings of theodolite (table S) 223 



Lines unobserved, method of observing at 



later date 2216 



Pointings, number of, requirements (table 



3) 223 



Recording (examples) I'l^' -. 



Rejection limits (table S) 223 



Requirements (table 3) 223 



Scheme junctions, required at 225 



Sum angles 2216 



Triangle closures, allowable (table S) 223 



Weather needed for 2213 



Other organizations' 



Connection, geodetic, with 224 



Method of 224 



Usefulness of 224 



Value of 224 



Description of stations 2271 



Existence of investigated 224 



Reference marks, establishment at 



stations 224 



station marks not to be disturbed 224 



Planning requirements 221 



Principal scheme, requirements 2111 



progress sketch 8512 



Purpose of 221 



reconnaissance - 222 



reconnaissance, air photographs used in 2221 



Reconnaissance on paper for 1331 



records 

 Office work required at Processing Offices. 9243 



Office work required of field parties 9233 



scheme, description 22 



Second-order , requirements (table S) 223 



Specifications for 22 



station(s) (see also Control stations) 

 AccessibiUty of 221(/) 



Page 

 449 

 452 



449 

 449 

 449 



864 

 864 

 864 

 865 

 863 

 862 



90 

 90 

 90 



60 

 101 

 688 



96 



1.32 

 54 



121 

 90 

 69 

 67 

 70 



82 

 76 

 10 

 76 

 70 

 69 

 70 

 70 

 70 

 71 

 75 

 10 

 69 

 21 



70 

 70 

 795 

 69 

 72 

 74 

 18 



846 



845 



69 



75 



69 



