INDEX 



Page 937 



Triangulation— Continued. Reference 



station(s)— continued. °- 



Classification of 211 



Definition 2112 



descriptions 227 



Preparation of — 227 



transmitted seasonally 854 



disks, rules for stamping 2263 * 



f212 

 Frequency requirements < 2231 



Hydrographic names used for 1744 



Lost , usefulness of data 7364 



Marking 226 



Rules for 2263 



marks (see Station marks) 



named after nearby geographic features 2156 



named after pri)inTty owners 2156 



names (see nlao Cdiitrdl statien names) 



abbreviatied for hydrographic use 215(e) 



How shown on smooth sheet 744 



Arbitrary hydrographic name used 744 



Length of 2151 



Permanent , once stamped 2156 



Preferable types of .._ 2156 



Proper form of 7443 



Replaced stations 2156 



Recovered 



Description data to be verified 2272 



Descriptions of _.. 2272 



Recovery of- — 225 



Reference noted on smooth sheet 746 



Re-marking 2261 



Replaced , naming 2156 



Search for 225 



sites, preferable .- 221 



sites, selecting 226 



f212 

 Spacing requirements 12231 



sjTnbol 

 Celluloid template for making 743 



Drawing {^^f 



symbolization.. (743(0)^ 



Unoccupied 2211 



Strength of figures (table 3) 223 



Substitutes for 228 



Superfluous lines. 2211 



Third-order , requirements 2211 



(tables) 223 



Weather needed for 2213 



Tributaries, minor, surveyed by sextometer. _ . 2382 

 Trinitrotoluene (TNT) (see also Bombs and 



Explosives) 666 



ammunition magazine 666 



characteristics 666 



Description 666 



Detonating 666 



Handling , hand lotion (formula) 666 



Handling , precautions required in l^. 



ingredients. 666 



locker, construction 666 



manufacture 666 



procurement 666 



stowage 666 



Trip hook, for use in handling buoys 2851 



Tripod signal 2723 



Centering over mark 2723 



construction 2723 



for hydrography ._ 2723 



for triangulation 2723 



Materualsfor 2723(A) 



Theodolite used at 2723 



Trolley soundings 32156 



Trough, definition : 16816 



Trucks, usefulness in surveying 135 



Trucks, use in rough terrain 1351 



Tubes, sounding 31 15« 



Tuning-fork control of echo-sounding instru- 

 ment speed 



Advantages 5165 



Frequency 



adjustment 5552 



verification .' 5551 



by break -circuit chronometer 5551 



by radio calibration signals 5551 



Operation 5165 



Turbulence f sea water, effect on transmission 



of sound 622 



Turning radius of survey vessel (see also U-turns) 



Descriiitivc Report requirements 842C 



to be (Iclcrmint'd 3463 



Use of in plotting turns 7682 



Values, approximate _ 7682 



Page 



59 



60 



82 



82 



804 



80 



61 



76 



64 



689 



680 



78 



64 

 689 

 689 

 64 

 66 

 66 

 690 



83 

 83 

 77 

 691 

 79 

 66 

 77 

 69 

 78 

 61 

 76 



689 



431 



689 



101 



688 



70 



75 



83 



70 



70 



75 



70 



96 



622 

 623 

 622 

 622 

 623 

 623 

 623 

 625 

 622 

 623 

 622 

 622 

 623 

 187 

 156 

 157 

 157 

 156 

 156 

 158 

 157 

 193 

 54 

 22 



521 

 520 

 520 

 520 

 454 



788 

 265 

 713 

 713 



Reference 

 No. 

 Turns 



at ends of sounding lines 3454 



Indicating on boat sheets. 3252 



Positionsat 3312(c) 



between closely spaced lines 3454 



Dead-reckoning , referencing vessel's po- 3463 



sition before a turn to its position 



after 3463 



Log loss around 3374 



Plotting launch 3463 



Plotting survey ship 



Plotting on smooth sheet 7682 



Two-barrel buoy (see Buoys, survey, two barrel) 

 Two echo-sounding instruments used in con- 

 junction 545 



u 



U-turns (see also Turning radius) 



Plotting on smooth sheet. 17682 



Union Jack, display of 1583 



United States standard datum 2171 



Units of nicasurenii'nt 124 



Universal liniftiiitr machine 4851 



Unnamed features, naming 164 



Unsounded areas 



Record of 3122 



Symbolization 3122 



Vacuum lead coring instrument 4763 



Valley, definition 1682d 



Variation of the compass 



Definition 4413 



Where to find value of 4415 



Vegetation, marine, symbolization.. 7863 



Vellum, tracing (see Tracing paper) 

 Velocity calibration of echo-sounding instru- 

 ments 



C. & Q. S. instruments ||gj 



r555 



Definition _. < gg j 



16311 



Velocity of sound, formula for any medium 63 



Velocity of sound (in sea water) 163 



Accuracy requirements for echo sounding 6313 



Accuracy requirements for R. A. R 6313 



Accuracy tested by distance arcs 6824 



Actual 5148 



Apparent horizontal (see also Velocity 



of sound, tests) 

 Currents effect on 6354 



Definition |g|^ 



D eterminat ion 6343 



determination by 



experiments 16351 



indirect method 6353 



(formula) 6353 



**^^*®- \6351 



Abstract reijuired 8333 



Reconls required 8311 



determined eniiiiric<iUy (see also Velocity 



of sound, R. A. R) 636 



Limitations of use 6343 



R. A. R., use of in j^^j 



Relation to theoretical velocities... 635 



Reliability of 6343 



required in R. A. R (6312 



Assumed 5148 



Average used in echo sounding 561 



Extent of applicability 561 



Average vertical 561 



Bomb Record entries 8311 



Bottom used in R. A. R 6362(e) 



British Admiralty tables 6343 



calibration (see Velocity calibration) 



computation(s) 6343 



from tables 6343 



recorded on Form 717... 6343 



Records required 8332 



correction (s) ■{ t5j 



abstract required in Descriptive Report... 8434 



Page 



262 

 210 

 213 

 263 

 265 



265 

 235 

 265 



506 



710 

 713 

 44 

 68 

 15 

 433 

 50 



194 

 194 



414 

 55 



336 

 338 



744 



520 

 528 

 520 

 528 

 528 

 575 

 574 

 446 

 573 

 575 

 576 

 641 

 446 



592 

 589 

 593 

 589 



573 

 590 

 591 

 591 

 573 

 590 

 782 

 775 



593 



503 

 589 

 589 

 573 

 575 

 446 

 529 

 529 

 529 

 777 

 594 

 588 



588 

 588 

 588 

 782 

 528 

 528 

 791 



