INDEX 



Page 919 



Reference 

 Radio Acoustic Ranging (R. A. R.)— Con. ^^• 



{1177 

 8312 



Disposal of - 8312 



Use in R.A.R. surveys 8312 



Use witii dead-reclioning 8312 



Dead reciconing used to evaluate data _ . 337 



Definition 61 



Description, general 3322 



development - 61 1 



Bureau of Standards collaboration in . 611 



History of 611 



War Department collaboration in 611 



differences of distance, plotting with 6826 



Analytical method {formulas) 6826D 



Example - 6826 



Graphic method 6826A 



Graphic-approximate method 6826B 



Mechanographic method 6826C 



Principles 6826 



Requirements for 6826 



Strength of position in 6826 



differences of time {see R.A.R. differences of 



distance) 

 distance arcs 



Colors used in inking 7637 



Inking on smooth sheet 7637 



Plotting 7631 



Stations nearly on range 6824 



Plotting boat-sheet positions with . _ 6824 



distance circles 7341 



Blue ink required for 7341 



Boat-sheet 3223 



Definition.- 7341 



Drawing 7341 



from station beyond sheet limits 7341 



from two nearby stations 7341 



Intervals between {table SS) 7341 



Precautions in drawing 7341 



Radius too long for beam compass 7341 



Velocity of sound used on smooth sheets 7.341 

 distances 



Bomb size, effect of on 76.36rf 



Control buoys, between two 



from on range beyond the buoys 25.33 



from ship station midway between _ 2533 



Control buoys located by {2574 



Accuracy requirements 2574 



Graphic analysis required 2533 



Rejection of values 2533 



Repetitions of measurements necessary. _ 2533 



Unequal distances required 2533 



Derivation _. 61 



Errors in , sources of _. 7636 



Plotting errors made in 76366 



Plotting with 



Odessey R. A. R. protractor 4537 



R. A. R. plotting scale 4828 



R. A. R. three-arm protractor 4538 



velocity scale 4824 



recorded in Bomb Record _ . 8311 



Reporting orally, correct method 3442 



Short , discrepancies in. ---|7636d 



Unit of measurement 124(«) 



Weighting according to lengths 2533 



elapsed times (see Elapsed times, R. A. R.) 

 equipment, ship (see also under specific name 



used in 672) 672 



antenna (see Antenna, ship, for R. A. R.) 



Circuit diagram of fig. llfl 



Functions of 672 



operation cycle described 672 



Experiments, first, in 611 



frequencies (see Radio in R. A. R., frequencies) 



Frequencies of sound utilized 62 



General statement 61 



hydrophones (see Hydrophones) 



initial, definition 68.53(o) 



initial interval, definition... 6853(6) 



Interference (see Chronograph tapes, strays 

 and Radio in R. A. R., interference) 

 Interference caused by submarine irregu- 

 larities 2574 



Limitations of use 613 



Oflficer-in-charge, duties 6711 



Paper for boat sheets. 3221 



personnel (see also Bomber, Chronograph 

 attendant. Radio technician, and 



Recorder) 671 



Additional required 6711 



Duties and organization 671 



for continuous operations 671 



for daylight operations 671 



required (table 2) 142 



237 

 778 

 778 

 778 

 778 

 232 

 .555 

 215 

 555 

 556 

 555 

 556 

 642 

 645 

 643 

 643 

 644 

 644 

 643 

 642 

 643 



707 

 707 

 303 

 641 

 641 

 675 

 676 

 205 

 675 

 676 

 677 

 677 

 676 

 676 

 677 

 676 



707 



122 

 122 

 121 

 144 

 145 

 123 

 123 

 122 

 121 

 555 

 706 

 706 



377 

 429 

 378 

 426 

 775 

 261 

 122 

 706 

 15 

 123 



628 



629 

 629 

 556 



558 

 555 



653 

 653 



146 

 557 

 627 

 205 



626 

 627 

 626 

 626 

 626 

 28 



Radio Acoustic Ranging (R. A. R.)— Con. Reference 

 personnel— continued. ^'^• 



Shore station requirements 671 



Watch periods 671 



Plotting by using differences of distances. 6826 



plottmg scale- 4828 



Description 4828 



How graduated 4828 



Method of use -{7631c 



Scales available--. 4828 



plotting table location 671 



position(s) 681 



accuracy, factors afTecting 6824 



Accuracy of distant 6824 



Accuracy, relative, of data 7634 



Bisectrix in {see Bisectrix) 



Communications, oral, connected with . 3442 



Connecting 7637 



data inadequate for plotting.. 7652 



Data obtained at time of -{esiS 



data, supplemental, recording 6811 



data, supplemental shore station 6816 



Dead-reckoning data used to sup- f6812 



plement \7634 



Description 763 



Description, chronological, of 3442 



determination 1 68 13 



Bomber's duties 6813 



Chronograph attendant's duties 6813 



Chronograph tape errors 6813 



Comparison of with other control 



methods 681 



Dead reckoning in 6824 



Hydro-radio switch operation 6813 



Sequence of events (example) 6813 



determined from three R. A. R. distances. 8311 



Distant , displacements in 6824 



Elapsed times, transmitting to plotting 



station (example) 6813 



Errors, typical, in 7636 



f3313 

 frequency 16812 



Maximum 6812 



on various coasts 6812 



Inking on boat sheet 6825 



Inking on smooth sheet 7637 



Intensity of sound data, recording - . . 6816 



Intensity of sound data, use of 6816 



interval 6811 



Numbermg ^^^^ 



(6714 



Official time of -^6811 



1831 1c 

 Personnel, duties of, in obtaining 3442 



Plotting methods.. ll^gjj 



Differences of distance used (see also R. A. 



R. differences of distance) 6826 



Distance circles used . 682 



Dividers and scale used.. 76316 



Odessey R. A. R. protractor used 17631a 



R. A. R. plotting scale used 7631c 



R. A. R. three-arm protractor used 4538 



Time circles used 682 



Velocity scale used 682 



Plotting ^^^ 



Bearings used 7633 



(6813 



Boat sheet -^682 



16821 



Stations on range 6824 



Data rcquirc<l for 682 



One di.staiK'i' arc only available 6822 



Pencil notes rt'quired on smooth sheet... 763 



Sextant angles, supplemental, used 7632 



Smooth sheet (see also R. A. R. smooth 



sheets) 682 



Supplemental data used 7632 



Supplemental station with no distance 



circles used 7631 



Velocity of sound for on boat sheet - . 6821 



Record (see Bomb Record) 



recorded in Bomb Record, ot Sounding 



Record 8146 



Reporting data orally, correct method- 3442 



Sounding Record, identified in 8141 



Soundings on , when obtained. 6811 



Statistics : 8311 



Strength of '. 6824 



Bottom material does not affect 6824 



Factors afTecting .'6824 



627 

 626 

 642 

 429 

 429 

 429 

 429 

 704 

 429 

 627 

 636 

 641 

 642 

 705 



261 

 707 

 709 

 636 

 638 

 636 

 639 

 637 

 705 

 702 

 260 

 636 

 637 

 637 

 637 

 638 



636 

 641 



638 

 637 

 775 

 642 



638 

 706 

 214 

 637 

 637 

 637 

 642 

 707 

 639 

 639 

 636 

 765 

 777 

 628 

 636 

 777 

 260 

 640 

 703 



642 

 640 

 704 

 378 

 703 

 704 

 378 

 640 

 640 

 639 

 702 

 704 

 638 

 640 

 640 

 641 

 639 

 640 

 703 

 704 



640 

 704 



704 

 640 



765 

 26i 

 761 

 636 

 778 

 641 

 642 

 641 



