Page 938 



INDEX 



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

 correction(s) — continued. '^^• 



Accuracy requirements 5612 



Algebraic method of determination -.. 5611 



Bar-check method of determination 15617 



Applicability of method. 5617 



Explanation of method 5617 



' Change points for tabulating 5614 



curves (Form J-100-5) -{seil^"*^ 



Foot corrections on 5614 



Graph paper described... 5614 



Identifying , 5614 



Preparing .__ 5614 



Pressure correction curve transferred 



to in graphic method 5615B6 



Submission of .„_ 8332 



submitted in velocity of sound report 5614 



Velocity of sound report to include . - 5614 



Zero line, detennining in graphic method . 5615B 



Definition j^^jj 



Depth-layer intervals for determination 



of 5613 



Depth layers determined for 5611 



Descriptive Report requirements 8434 



determined by 



averaging temperatures and salinities 5611 



averaging velocities 5611 



summation of corrections 5611 



Factor for determining (formula) 561 



factors (table 35) _.. 9613 



for variations from true velocity 5148 



graph (s) 



designed for use with Form J-100-5 5615A 



Dividers used on 5615Ba 



Explanation 5615 



Illustration, fig. 115 



index line, explanation of 5615B 



index line, rule for changing 5615B 



Method of use 5615B 



for a nonstandard instrument velocity. _ 5615B 



for depths greater than 200 fathoms 5615B6 



for depths in feet 5615Bc 



for depths of 200 fathoms or less 5615Ba 



Pressure curve transferred to velocity 



correction curve (Form J-100-5) 5615B6 



Pressure correction curve explained 5615B6 



Pressure correction curve transferred to 



velocity correct ion curve 5615B 6 



Principles of construction. _ 15615B6 



scales. 5615A 



Explanation of use (seiSBo 



Use 5615 



Graphic determination (see also Velocity of 



sound correction graphs) 5615 



Index-adjustment method -{fgJgQ 



Specifications for use.. 5616a 



Instrumental-adj ustment method _ _ 5616 



Applicability of method 5616 



Methods of applying |gg. 



Methods of determining ._ 5611 



method used in C. & Q. Survey... -.. 5611 



Motor-speed regulation method 5616 



Numercial determination. 5613 



Example table 20 



Salinity layers for __ 5611(3) 



tabulated in Descriptive Report 5614 



tabulation, change points for 5614 



Tabulation required 5614 



Temperature(s) (see also Temperature) 



for , accuracy required 5612 



layers for 5611(3) 



Salinity and for velocity corrections. 5612 



Salinity and curves for velocity cor- 



rections- 5612 



curves 



Characterof 6232 



Construction of 6343 



Use in echo sounding 6343 



Use in R. A. R 6343 



determination.-- 635 



Determination of mean 6311 



determined experimentally (see also Velocity 

 of sound, apparent horizontal) 



Abstract of tests required 8333 



Observed distance data recorded in Sound - 



ing Record 8311 



R. A. R. distances recorded in Bomb Rec- 

 ord 8311 



diagrams 9612 



E cho sounding, determination o 1— — for. . 63 



530 

 529 

 527 

 538 

 538 

 538 

 534 

 530 

 533 

 533 

 533 

 533 

 533 



537 

 782 

 534 

 534 

 537 

 528 

 575 



531 

 529 

 791 



529 

 529 

 529 

 529 

 879 

 446 



535 

 537 

 537 

 536 

 535 

 536 

 535 

 535 

 537 

 537 

 535 



537 

 537 



537 

 535 

 537 

 535 

 535 

 536 

 535 



535 

 538 

 538 

 538 

 538 

 538 

 528 

 529 

 529 

 529 

 538 

 531 

 532 

 529 

 534 

 534 

 533 



530 

 529 

 530 



570 

 589 

 589 

 589 

 589 

 575 



782 



775 



775 

 876 

 573 



Reference 

 Velocity of sound (in sea water)— Continued. ^''• 



Echo sounding, effect on 5148 



Echo sounding, from tables for 63 



Echo sounding, requirements 561 



Echo sounding, use of in 631 



Eflcctivo horizontal used in R. A. R 63 



Erroneous , effect on R. A. R. positions . 7636c 



Experimental , definition 6.343 



Experiments, early, to determine - 512 



f561 



Factors affecting 16343 



[636 

 factors, correction, for use in echo sounding 



(table 35) 9613 



factors, reduction, for use in R. A. R. (table 



36) ---. 9614 



Formula, approximate, for * 63 



Formula for any medium 63 



Gas in suspension, effect on 623 



General statement 63 



gradient, effect on 



path of sound 6232 



R. A. R - 6343 



sound transmission.-- ^ 636 



Ideal water medium 6222 



Latitude effect on 63 



Materials in suspension, effect on |g~ 



Mean determined 6311 



nonuniform in heterogeneous medium 623 



Plotting used on R. A. R. smooth sheetS-jg^J 



pressure correction, formula for determining- 6343 



Pressure, effect on 163 



R.A.R., — in..-.- g3 



Averages assumed for 6362 



Boat-sheet plotting 6821 



Bottom velocity used 6362(«) 



Depth, velocity at a selected, used..^ 6362(e) 



Determining 



empirically 636 



General procedure 6361 



Specific rules 

 Theoretical and apparent velocities 



agree 6362(«) 



Velocity decreases with depth 6362((/) 



Velocity increases moderately with 



depth 6362(6) 



Velocity increases rapidly with depth.. 6362(c) 

 Velocity is nearly constant vertically.. 6362(a) 



Velocity reverses with depth 6362(e) 



Factors affecting 6362 



Rules for determining , general 6361 



Rules for determining , specific 6362 



Smooth-sheet plotting 18311 



Sound wave path, effect on 635 



(63 

 Use of {631 



[6312 



Range 5148 



recorded on Form 717 6341 



records 833 



reduction factors for use in R. A. R. (table 36). 9614 



(5612 

 Salinity, eflecton -^623 



[63 

 scale, R. A. R. (see R. A. R. velocity scale) 



Suspended particles, effect on I g, 



table(s), C. & G. S 961 



Explanation of (for) 6343 



pressure variation (table Si) 6343 



salinity variation (table S3) 6343 



temperature variation (table 32) 6343 



used in echo sounding 63 



tables, British Admiralty. -. 6343 



Temperature, eflecton <g«. 



Tests to determine apparent horizontal 



Abstract required 8333 



Bombs used in 6351 



Buoys used in 6351 



Conditions tor making 6351 



Evaluating for use in R. A. R 6362 



Frequency of 6352 



Records required.. --- 8311 



Serial temperatures in 6351 



Shore objects used in 6351 



Taut-wire measurements, during 6351 



Theoretical 



Determination of for use in R. A. R--. 6362 



for any depth 635 



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