INDEX 



Page 935 



Reference 

 Three-point fix(es)— Continued. ^^• 



Small angles to be avoided 3333 



Spacing soundings controlled by 7721 



Split .plotting 7625(6) 



Strength of -.. - 3332 



Strength of various station arrangements 



discussed 3332 



Sum angles in 3333 



"Swinger" 3332 



Protracting —- 7625(c) 



Tangents used in 33366 



Theodolite ..- 2285 



Classification of 211 



Theory of the 3331 



Weak , how to detect 3333 



Weak plotted on circle sheets 376 



Where required - 333 



with no common center object 3335 



Protracting _ 7625(6) 



Three-point problem, classification of stations 



located by -.- 211 



312 Fathometer - ^l\^ 



amplifier, echo ^-. 5214 



calibration velocity 521 



calibration velocity, computing (formula) — 5553 



depth range --- 521 



Description 521 



dog adjustment.! 5543 



Dorsey F'athometer No. 3 used in combina- 

 tion with 545 



Circuit arrangement fig. 110 



draft adjustment. - 5543 



draft measurement reference point 5511 (a) 



hydrophones, types used 5213 



index 5215 



index adjustment.. 5543 



100-fathom scale. 5543 



Separation error accounted for 556 



600-fathom scale 5543 



indicating mechanism 5215 



instrumental error adjustment 5543 



motor generator 5212 



motor speed 

 adjustment and verification (see also 312 



Fathometer, tachometer) 5553 



indicated by reed tachometer 5553 



100-fathom cutout 5215 



{521 

 5216 



oscillator 5211 



Description- 5211 



frequency 5211 



Separation eflect, compensation for 556 



Settlement and squat adjustment... 5543 



Sounding in deep water with 581 



soundings on 600-fathom scale, correcting 5543 



tachometer, reed , frequency 



computation of (formula) 5553 



Operating procedure with erroneous .. 5553 



record of verification 5553 



verification of 5553 



verified with chronograph 5553 



verified with stop watch 5553 



transmitted signal, adjusting length of 5543 



Veslekari used in combination with 545 



Tidal data, need for 143 



Tidal planes (see Sounding datums and Verti- 

 cal datums) 

 Tide(s) (see also Bench marks) 



Coast Pilot requirements 916 



corrections (see Sounding corrections, and 



Echo sounding corrections) 

 curve (see Tides, predicted) 



gage, automatic 467 



Cleaning 4671 



Discontinuing 11435 



Frequency of inspection... 467 



inadequately located. 774(/) 



location to be noted in Sounding Record JglSi 



Operation of 4671 



Portable 1432 



Packing for shipment 434 



Standard 1432 



Float well dimensions 4671 



Preparing for shipment 434 



Removal from packing case 4.34 



Height of 



Correcting soundings for 8224 



Preferable for surveys in dangerousf346 



waters ..\3661 



evel affected by storms 916 



Page 

 217 

 719 

 702 

 217 



217 

 218 

 217 

 702 

 220 

 88 

 60 

 217 

 218 

 295 

 216 

 219 

 702 



60 

 441 

 455 

 458 

 456 

 523 

 455 

 455 

 517 



507 

 506 

 517 

 508 

 457 

 458 

 517 

 517 

 526 

 518 

 458 

 517 

 457 



522 

 522 

 459 

 456 

 459 

 456 

 456 

 456 

 525 

 517 

 552 



518 



523 

 522 

 522 

 522 

 522 

 522 

 517 

 507 

 31 



839 



398 

 399 



32 



33 

 399 

 726 

 767 

 773 

 399 



32 

 334 



32 

 399 

 334 

 334 



773 

 263 

 283 



839 



Tide(s)-Continued. Reference 



note No. 



Descriptive Report requirements. {844c 



Final values inserted in Descriptive Re- 

 port. -- 844c 



Final values prepared at Washington 



Office- - 9323 



observations by radio 1437 



observations, offshore 

 with Dorsey Fathometer 



Frequency of 1436 



Method - 1436 



Recording 1436 



shown on hydrographic sheets 1434 



with echo-sounding transceiver on bottom_ 1436 



with gage on bottom 1436 



Predicted 



curves furnished by Washington Office 1522 



Range factor, ho w to apply 15226 



Time correction, how to apply 1522a 



from Tide Tables-. 1521 



Method of predicting 1521 



Use in survey operations - 152 



records 

 not to be forwarded to Processing Offices... 9234 



Transmittal of 1435 



station(s) 143 



Descriptive Report requirements 842i) 



EstabUshment of , report required 1434 



Establishment of , selection of sites 1431 



General plan for 1432 



Instructions for 1215 



level records, transm ittal of I ^^^ 



records 4672 



Reductions required 4672 



Sounding Record requirements 4672 



Secondary 1432 



Minimum period of operation 1432 



Smooth-sheet requirements 7865 



Standard for project.. 1432 



Tables, use for predicting tides 1521 



Tide rips 



Coast Pilot requirements 916 



Symbolization on smooth sheet 7861 



Tiller rope (see Leadline material) 



Time in Sounding Records 



Method of numbering hours 8142 



of miscellaneous events 8142 



Time lags in echo-sounding instruments 



Eflect 5163 



Errors in soundings caused- by 552 



TimepiecP-s - - 454 



f512 



Titanic, sinking of |gj| 



Title sheet (Form 537) 



Hydrographic survey __ 8412 



inserted in Descriptive Report — 8412 



Title(s), survey 



r793 

 Information for , furnished on fonn \8412 



Smooth-sheet 793 



TNT (see Trinitrotoluene) 



Topographic 

 details (see also High-water line and Shoreline) 

 Agreement on topographic and smooth 



sheets 75 



Importance on charts.. 23 



inked on smooth sheet only as specified 75 



Inshore omitted from smooth sheet — 75 



in sounded areas left in pencil temporarily. . 755 



Omission from smooth sheet authorized 751 



Reconciliation with hydrographic data 



reported in Descriptive Report 8420 



[3244 



Revision of by hydrographer ■{381 



13811 



Symbolization on boat sheet ---13811 



sketched from launch 2461 



Smooth-sheet near control stations 75 



transferred to smooth sheet 75 



by method of squares 7562 



by radial-line method 7563 



by tracing-paper method 7561 



from air photographic surveys 733 



Verification of 757 



{381 

 3811 

 sheet (s) 

 Aluminum-mounted (see Aluminum- 

 mounted topographic sheets) 

 Features to be named on 161 



Page 

 791 

 793 



793 



848 

 34 



33 

 33 

 33 

 33 

 33 

 33 



37 

 38 

 38 

 36 

 36 

 36 



845 



33 



31 



788 



33 



32 



32 



11 



32 



33 



399 



399 



399 



32 



32 



744 



32 



36 



839 

 743 



762 

 762 



453 

 510 

 379 

 439 

 555 



787 

 787 



751 

 787 

 749 



691 

 88 

 692 

 692 

 694 

 692 



788 

 209 

 296 

 296 

 209 

 296 

 107 

 692 

 692 

 695 

 696 

 695 

 674 

 697 

 296 

 296 



