INDEX 



Page 901 



Reference 

 Descriptive Report(s)— Continued. ^°- 



Shoreline revision explained 381 



Statistics required 8431 



text, arrangement of 842 



text, preparation of 842 



title ■- 8411 



Verifier's use of 9331 



Detached positions 



Check angle required Wgg 



Importance 766 



Plotting on smooth sheet 766 



Verification of 7911 



Detached soundings (see also Detached posi- 

 tions) 



Settlement and squat correction - - 553 



Detaching rod 



Depth to be used in --- 4665 



^ . ,. /4665 



Description 14744 



Sinker used with --- -{4744 



Dimensions and weight 4665 



Detail, excessive, avoided in Coast Pilots 916 



Details on smooth sheets, inked or penciled 



{table S8) 792 



Details to be included in Coast Pilot {see speci- 

 fic item in alphabetical Glossary, 

 91G, page 824) 

 Detonation of bombs 



Depth reduction 6846 



Failure to detonate, causes 6848 



Detonator(s) --- - 667 



Crimping , method 6842 



DuPont "SSS" used in experiments.-. 667 



Exploding 667 



Induction period in 667 



Time lag in 667 



Type of required for R. A. R 667 



Use in experiments.. 667 



fuse {see also Fuse) 668 



Ad van tages 667 



Description 667 



Mercury, fulminate of, used in 667 



Inserting in bombs 663 



Purpose 667 



Stowage 667 



Types 667 



Development, hydrographic 355 



Boat sheet marked for 3242 



Bottom character to be considered SG2l{c) 



Changeable area requirements 355 



Completion of at end of seafion 1343 



Congested {see Congested areas and 



Overlay tracings) 



Defmition 355 



Extensive shoal areas 367 



Extent of 355 



Inshore areas 355 



Navigational importance of area to be con- 

 sidered 3621(6) 



Need for to be expected 3243 



requirements indicated by adjacent land 355 



Sand banks 367 



Shoal indications 355 



Sounding-line direction 3662 



Wire drag substituted for 355 



Deviation {see Compass deviation) 

 of radio direction finder (see Radio direction 

 finder) 



Diatom ooze 3848 



Differences, distance, R. A. R. {see R. A. R., 



differences of distance) 

 Differences in depth (see Depth differences and 

 Soundings at crossings) 



Diffraction of sound, effect on R. A. R 6233 



Dinghy, description and use 4247 



Dip of the sea horizon 



correction to sun-azimuths 941 



Formula for 3362 



Direction, sounding line, R. A. R. (see Sound- 

 ing lines, R. A. R.) 

 Direction theodolites (see Theodolites, di- 

 rection) 

 Directions (see Sailing directions) 



Sailing {see Sailing directions) 



Directivity of echo-sounding transmitting 



units 5145 



Direct path of sound, maximum length 6223 



Discontinuity of medium transmitting sound.. 



Factors causing 5144 



Reduction of echo intensity due to 5144 



Discrepancies between topographic and hydro- 

 graphic surveys to be reconciled 381 



Discrepancies, depth {see Depth differences) 



Page 

 296 

 791 



787 

 787 

 786 



282 

 711 

 710 

 710 



748 



513 



398 

 410 

 398 

 410 

 398 

 830 



649 

 650 

 624 

 647 



624 

 624 

 624 

 624 

 624 

 624 

 625 

 624 

 624 

 624 

 621 

 624 

 624 

 624 

 272 

 208 

 278 

 273 

 21 



273 

 285 

 273 

 273 



278 

 209 

 273 

 285 

 273 

 283 

 274 



306 



573 

 328 



861 

 228 



445 

 565 



444 

 444 



296 



Reference 



No. Page 

 Disk, station mark (see Stations, control, marks) 

 Displacement, vertical, of vessel (see Settle- 

 ment and squat) 

 Distance (s) 



Dead-reckoning 3374 235 



Estimated , unit of measurement, 



standard 124(6) 15 



Estimating at sea 335 225 



Map 



measured with map measure 4833 431 



measured with opisometer 4832 431 



measured by 



depression angle 3362 228 



Precautions required 3362 228 



range finder, accuracy Obtainable 455 382 



sextant (see Sextometer) 



subtended vertical angle 3363 230 



Precautions required 3363 230 



Ship's foremast used 3365 231 



taut wire - 4466 356 



vertical angle above horizon 3364 230 



Formulafor 3364 230 



Units of measurement, standard 124 15 



Units used in Coast Pilots 916 831 



Distance angles (see also Circle sheets) 



Use in developing shoals... 3662 283 



^^ . . ,. ,. f3143 200 



Use in running sounding Imes. 13453 262 



Distance arcs, R. A. R. (see R. A. R. distance 



arcs) 

 Distance circles, R. A. R. (see R. A. R. distance 

 circles) 



Distance to work in Sounding Record 8133 760 



Distortion in drawing paper «a6Ze ;23) 7114 659 



Distortion, survey sheet 



Determining 7361 678 



Determining east and west .-- 7371 682 



Dms. and dps. adjusted for 7411 684 



effect on projectionless sheets 737 680 



Dividers 481 418 



Bow-spring 4811 420 



Description 4811 420 



Hairspring 4811 420 



Adjustments 4811 420 



Description 4811 420 



Ordinary 4811 420 



Careof 4811 420 



Description 4811 420 



Sharpening points 4811 420 



Sizes 4811 420 



Proportional 4812 420 



Description 4812 420 



Purpose 4812 420 



Rangeofratio 4812 421 



Setting by trial and error 4812 421 



used in plotting control stations 7414 686 



Spacing 4813 421 



description and size 4813 421 



Spacing soundings with 4813 421 



Use 4813 421 



Dms. and dps. 



Definition 7411 684 



Plotting control stations from 7411 684 



Doek(s) 



Definition 916 831 



Sounding in 3434 258 



Soundings in , at enlarged scale 7751 728 



^ , , fl366 26 



Dog-ear(s) jyijl 660 



Attaching to smooth sheet 7121 660 



on boat sheets 1366 26 



Station on , radiating lines to 7121 660 



Dome, definition... 1682e 55 



Doric tracing paper 7142 662 



Dorsey chronograph («e« Chronograph, R. A. 



R., Dorsey) 

 Dorsey Fathometer, depth units to he used 



with 3112(6) 192 



T. T. *., <- XT n /5134 442 



Dorsey Fathometer No. 1 "1524 473 



Accuracy 52i{g) 473 



amplifier, description 5242 475 



Cables to be used in installing 541 504 



, .. (5134 442 



depth range 1524 473 



depth scales 5243 475 



Description 524 473 



diagram, schematic fig. lOi 474 



Draft measurement reference point 5511(6) 508 



808 Fathometer used in combination 



with 645 506 



Errors in reading 545 506 



Features, salient 524 473 



First use of 5134 442 



Half-synchronous speed, avoiding 5245 477 



