INDEX 



Page 



Velocity of sound (in sea water)— Continued. Reference 



Theoretical— Continued. ^°- 



for echo sounding -.. Lgg 



used in R. A. R 16362 



Use, practical, of 631 



Value used in plotting R. A. R. smooth sheets.Lgj J 



Variable nature of 636 



variations -Iggj 



Regional 561 



Seasonal 561 



with depth —{If 



with salinity 63 



with temperature <g3 



Vertical mean 561 



Extent of applicability -.. 561 



Verification of hydrographic surveys 



at Washington Office 933 



Boat sheet, use of, during 3212 



Definition 1^^^ 



Inspection for adequacy 9342 



Instructions, miscellaneous -.. 9338 



Report of ..- 9339 



Purpose 9339 



fnoo 

 934 

 statistics, office 9339 



Verffier 

 Dutiesof 933 



Report, written, of 9339 



Purpose 9339 



Reviewer's use of 9346 



Vertical angle (s) 



Computing elevations from {form) 382 



Subtended 



Banners on buoys at known height 281 



Formula 3363 



U se i n surveying offshore shoal 368 



to hills and mountains- 247 



Use in measuring distances 3364 



Vertical casts {see Simultaneous comparisons 

 and Wire soundings) 



(2173 

 Vertical datums {see also Sounding datums)._-{2311 



17821 



Coast Pilot usage 916 



Definition (sounding datum) _._ 7821 



{2171 

 2311 

 for hydrography. |^g2i 



for topography ---{2311 



Tidal plane heights furnished 1215 



Tidal plane heights in Descriptive Report... 844c 

 Vertical soundings {see Simultaneous compari- 

 sons and Wire soundings) 

 Veslekari 



acoustic units, importance of location. 543 



cables, electric. 543 



contactor box, function.. 5272 



depth range 527 



depth scales 5271 



Description 527 



Dorsey Fathometer No. 3 combined with . 545 



Draft measurement reference point 5511((f) 



fathogram 



Interference band 5271 



paper, description 5271 



reference line 5271 



scale 5271 



TiTstuse\n~6y&'QVs\V/.V//"/S//.'.'.'.'.'.'.'.'.'. 5137 



index adjustment 5544 



Separation effect accounted for. 556 



Simultaneous comparisons for 5544 



installation 543 



Acoustic unit lu'i 



Recorder cabinet 543 



Interference band 5271 



keying mechanism 5271 



magnetostrictive unit(s) 5273 



Description 5273 



frequency 5273 



Illustration fig. 109 



installation 1^^ 



operation... 5273 



radiation angle. 5273 



motor, driving 5271 



Page 



588 

 589 

 593 

 593 

 575 

 676 

 778 

 593 

 446 

 575 

 528 

 528 

 528 

 574 

 574 

 403 

 574 

 529 

 529 



204 

 848 

 854 

 855 

 854 

 854 

 854 

 849 

 854 

 854 



849 

 854 

 854 

 857 



298 



163 

 230 

 286 

 108 

 230 



734 



830 



734 



69 



734 

 69 



12 

 793 



505 

 505 

 496 

 495 

 496 

 495 

 606 

 508 



496 

 496 



443 

 518 

 526 

 518 

 504 

 497 

 505 

 504 

 496 

 496 

 497 

 497 

 497 

 497 

 497 

 505 

 498 

 497 

 496 



Reference 



Veslekari— Continued. No. Page 



motorspeed 5555 523 



Adjusted 5555 524 



adjustment 

 by comparison with the Dorsey Fathom- 

 eter No. 3 5555 524 



by timing revolutions 5555 524 



Fathogram record of 5555 524 



for a velocity of 820 fathoms per second.. 5555 523 



Procedurefor 5555 524 



verification and adjustment 5555 523 



verification, frequency of... 5555 523 



Operation. 5271 496 



parts, principal 527 495 



phasing control operation 5271 496 



recorder cabinet. 5271 496 



recording device 5271 496 



signal transmission 5271 496 



stylus, motion of 5271 .496 



Tanks for acoustic units, construction 



specifications 543 505 



312 Fathometer combined with 545 606 



Vessel(s) {see also Ship) 



Auxiliary of the Coast and Geodetic 



Survey.. 41 311 



Cruising radius 41 311 



Dimensions and particulars (fafiZe 5).. 41 313 



Fuel capacity 41 311 



Draft of {see Draft) 



Survey 



Descriptive Report, used noted in 842C 788 



Handling while sounding 346 263 



Risks in surveying shoals 361 276 



Turning radius to be determined 3463 256 



Vincent hydrophone {see Hydrophones, sono- 



radio buoy, Vincent) 

 Vincent sono-radio buoy {see also Sono-radio 



buoy, Vincent) 651 601 



Viscosity (of sea water) 



Attenuation of sound caused by 6224 565 



Definition.- 6224 565 



Sound transmission, effect of on 621 559 



Visibility at sea 



Formula for computation of 272 154 



Refraction, effect of 272 154 



Visual indicator {see Registering devices) 



w 



War Department, study of sound transmission- 611 556 



Warning signs on sono-radio buoys. 2814 165 



Watch officer {see Bridge, ship, officer) 



Watch, relief of, in vicinity of danger 1581(7) 44 



Watch, stop 



Use in astronomic observations 3384 240 



Use in hydrographic surveys 4544 382 



Water areas, legend to accompany stations in . . . 7444 690 



Water bottle, Qreen-Bigelow, description 4742 409 



Water bottle, insulated _ 4716 403 



Watercup, Sigsbee, description 4741 409 



Waterfront changes reported by Coast Pilot 



reviser 9133a 814 



Waterfront detail, symbolization on smooth 



sheet 752 693 



Water jet, used in signal construction 274 160 



Water sample(s) 



Instruments for obtaining 474 409 



Preservation 6331 586 



Retention, instructions for 6331 586 



Salinity determinations. 475 410 



salinity, record of 6331 586 



shipment, instructions for 6331 586 



specific gravity 6331 586 



Water, sea {see Sea water) 



Water signal (s) 274 158 



constructed from moored launch 274 160 



illustrated fig. 44 159 



Steel towers used as 274 158 



tripod 274 160 



Water jet used in construction. 274 160 



Water specimen cups 474 409 



Water surface of earth, percentage 476 413 



Water tower, definition 8534C 804 



Waterways 



Narrow surveyed by sextometer 2382 96 



Navigable sounded to head of navigation . 3123 194 



Unimportant 



Establishing control in 2462 107 



Omission of control in 3352 226 



Winding 



Control located by sextant triangulation 2462 107 



Positions transferred from boat sheet to 



smooth sheet. 7682 713 



surveyed by sextometer 2382 96 



Wavelength, definition.. 621 559 



