INDEX 



Page 917 



Position(s)— Continued. Reference 



Hydrographic— Continued. '■^"• 



(lata 



recorded horizontally 817 



Recording in Sounding Record 814B 



data, miscellaneous 



Numbering 8146 



Plotting on smooth sheet 769 



data, supplemental 



Recording in Sounding Record 8146 



differing on two overlapping surveys 361(/i) 



errors discovered during smooth plotting 774 

 errors, typical 774 



Estimated S335 



Plotting - 763 



transferred from boat sheet to smooth 



sheet 7672 



finding 33 



fi.\ing, operation of 344 



frequency 3313 



C33J3 

 Dead reckoning 13381 



Echo sounding- 3313 



Handlead sounding 3313 



{3313 

 344 



R. A. R. surveys 3313 



Requirements, general 3313 



Wire soundings . 3313 



Identifying 331 



on smooth sheet 768 



Incompletely fixed 3376c 



Inking 768 



Inshore end.** of sounding lines, at I n^^■^ 



Launch observed from ship on parallel 



course 3366 



Linear measurements, by - - . 3344 



Method of numbering 3312 



Numbering 1.3312 



Instructions for 3312 



numbers 



Inking in congested areas 7681 



Inking on smooth sheet 7681 



Placement with reference to soundings.. 7681 



Size 7681 



Sounding Record requirements 8141 



Plotthig 76 



Check provided by boat sheet. _ 7624 



Check provided by dead-reckoning 7624 



Procedure 7624 



Sequence of 76 



Systematic procedure required 76 



Protracting procedure 7624 



recorded in a separate record 831 



Recording in Sounding Record 8146 



referenced to shore details 3352 



referenced to shoreline 3351 



Regularity of jg^^ 



Reliability of on boat sheet 7671 



Shore observations, fixed by 3323(a) 



Sounding at ■{3^^ 



Transit on shore and one sextant on board 



used to fix 3343 



Transit used to fix 3342 



Trial 



Definition 3452 



not to be substituted for more frequent 



recorded positions 3452 



Recording 3313 



Use of at beginning of sounding line. 3451 



Verifier's check of , at Washington 



Office 9332 



Wire measurements along sounding line, 



fixed by 3344 



R. A. R. {see R. A. R. positions) 



Bisectrix in {see Bisectrix in R. A. R.) 



Postal Guide, use of names in 1672 



Pounce, use on tracing cloth 7141 



Power supply {see also under name of specific 

 instrument) 



Dorsey Fathometer No. 1 5244 



Precautions in surveying dangers and shoals. . 361 



Precession of gyrocompass, magnitude of . 4423 



Precession of gyroscope 4421 



Precise dead reckoning, description 3379 



Predicted tides {see Tides, predicted) 

 Pressure of sea water 

 correction curve for velocity of sound correc- 

 tions 5615B6 



for depths greater than 2,000 fathoms 5615Bft 



transferred to velocity correction curve 5615B6 



corrections to velocity of sound {table 34) .. . 9611 



Page 



765 

 714 



765 

 276 

 725 

 725 

 216 

 225 

 702 



7U 

 212 

 259 

 214 

 214 

 238 

 214 

 214 

 214 

 259 

 214 

 214 

 214 

 212 

 712 

 236 

 712 

 225 

 264 



231 

 224 

 213 

 212 

 213 

 213 



712 

 712 

 712 

 712 

 761 

 697 

 700 

 700 

 700 

 697 

 697 

 700 

 775 

 764 

 226 

 226 

 214 

 259 

 711 

 216 

 257 

 259 



224 

 223 



262 



262 

 215 

 261 



8.50 



224 



53 

 662 



477 

 276 

 341 

 340 

 237 



537 

 537 

 537 



872 



Reference 



Pressure of sea water— Continued. ^'^- 1'a.ge 



gradient, flTcct on path of sound 6222 564 



relation to de|)th 561 528 



Velocity of sound, effect on 63 574 



Pressure tubes 3115o 193 



Primary submarine features, terminology 1681 54 



Principal point of air photograph 2391 98 



How identified 2391 98 



Print date on charts, definition 1127 6 



Printing requisitions 9137 821 



Prior survev(s) 



Advance study of .... 1331 18 



Comparison of smooth sheet with 9343 856 



reported in review 9348£ 858 



data 



applied to charts erroneously 3522 269 



carried forward to new surveys 19,343 856 



Copies of furnished with project in- 

 structions 131 15 



Verification of required 3234 207 



Dangers 3521 268 



Rocks, bare 3521 268 



Shoals 3521 268 



Wrecks 3521 268 



Datum, changing, on 736 678 



Hydrographic 



Bottom characteristics used from 3842 302 



Comparison with new hydrographic sur- 

 veys in Descriptive Report M2L 789 



data to be transferred to boat sheet 3234 207 



Junctions with 313 194 



Quality of 3521 268 



Verification of 3521 268 



Photographic copies of 313 194 



Rocks from in disagreement with new 



survey, rules for disposition 9344 856 



Rocks on disproved . 363 281 



Private property 



Entrance to 271 153 



Signal building on 271 153 



Processing OfRce(s) 



accounts, handling of 926a 846 



activities 92 842 



Officer-in-charge 921a 843 



Office work on records required 924 845 



personnel 921 843 



Progress 



reports, monthly 8514 795 



reports required of Processing Offices 926& 846 



sketches 851 793 



Annual 8513 795 



Monthly 8511 794 



Period covered 8511 794 



Preparation 8511 794 



scale -■ 8511 794 



Season's 8512 795 



Semi-annual 8513 795 



Unsatisfactory of field work, explained 



in Descriptive Report . 842B 787 



Project(s) 



Advance study of 133 18 



area divided into zones for hydrographic sur- 

 veys 134 20 



Buoy-control , statistics 258 146 



Definition 12 8 



instructions 



Descriptive Report, listed in 842A 787 



General 1211 9 



General content .. 121 9 



Miscellaneous __ 1218 13 



Receipt of to be acknowledged 121 9 



Triangulation, for 1212 10 



junctions with prior surveys 313 194 



layout {see also Sheet layout) 136 23 



chart accompanying instructions 121 9 



limits. 312 193 



Numbering 12 8 



Offshore limits of 312 193 



planning 13 15 



Reference, correct, to a 121 9 



Projection(s) 



constructed after completion of survey . . 737 680 



on large-scale .sheets 7372 682 



on small-scale sheets 7371 681 



Discontinuous constructed on sheet after 



completion of survey 7373 683 



Gnomonic .. 1122 3 



line(s) 



Accuracy of 232(a) 90 



Degrees and minutes at ends of 7323 669 



intervals on smooth sheets (?a6/e 24) 7323 669 



width 7323 669 



Map 



deficiencies 732 667 



General description 732 667 



