Page 934 



INDEX 



Temperature(s)— Conlinucfl. Reference 



gradient — continued. ^°- 



Effect on path of sound 6232 



reversal, definition 682c 



reversal, effect on R. A. R _ 632c 



graphs (see Temperature curves) 



Hypothalassa, definition 632a 



layers used in velocity corrections 5611 



Measuring w hilo underway ._ 4732 



observations (see Temperature, serial obser- 

 vations) 



Oceanic areas... 6326 



Plotting (see also Temperature curves).. 5611 



Published 



Atlantic Ocean 6322 



Gulf of Maine 6322 



Monterey Bay, California 6322 



ranges in offshore areas (efi/ 



Refraction of sound, effect on 6232 



reversals (see Temperature gradient reversal) 

 Seasonal change, importance of 632 



Seasonal distribution near surface {fisid 



seasonal variation in Alaska 5612 



seasonal variation in Hawaiian Islands 5612 



seasonal variation on Pacific Coast _ 5612 



Serial , definition. 6321 



Serial observations 



Accuracy required 4714 



Bathythermograph use. _ 6322 



Bottom observation 6321 



Deep observations 6321 



Definition 6321 



Depth interval requirements _ 6321 



Echo sounding, for use in 6322 



Expediting 6321 



frequency g 



depends on velocity variation.. 6322 



varies with locality. 6322 



in deepest area of survey 6322 



Instruments for 6321 



Method 6321 



Plotting 5612 



Precautions required (6321 



Procedure 6321 



where depth is known.. 6321 



where depth is unknown 6321 



where temperature variation is unknown. 6322 



records.. 6341 



required 8331 



Transmittal 6342 



Ship maneuvers while taking 6321 



Surface observations 6321 



Thermometer corrections -{471I 



Thermometer standardization 6321 



Time required for 6321 



Times of making __ 6322 



using insulated water bottle 4716 



where temperature reversals occur 6321 



Solar radiation the principal agent affect- 

 ing 632 



Summer maximimi 632 



Surface 



Continuous record of 478 



observations, method 6321 



Thermocline (see Thermocline) 



Velocity of sound, effect on 63 



Vertical distribution, importance of 632 



Winter minimum 632 



Templates, celluloid, use in radial-line plotting. 2391 

 Templates, lettering (see Lettering sets, me- 

 chanical) 

 Terminology 



Coast Pilots, standard for use in (list)-.. 917 



Hydrographic reports, standard for use 



in (list) 917 



Submarine relief (definitions) . 168 



Theodolite(s) 



Control buoys, used to locate 2521 



Direction 



Advantages 2213 



Description 2214 



Horizon closure with 2216 



Initial settings for observations 223 



9-inch used without tripods 2214 



Drag in plates, test for 2216 



Pelorus, used as. --{4436 



Repeating 



Advantage 2214 



Initial settings for observations 223 



Use 2214 



set up on unstable ground.. 2215 



Page 

 668 

 577 

 577 



576 

 529 

 407 



576 

 529 



583 

 583 

 583 

 578 

 579 

 568 



576 

 577 

 579 

 530 

 530 

 530 

 579 



403 

 583 

 580 

 580 

 579 

 580 

 582 

 581 

 530 

 582 

 582 

 582 

 682 

 579 

 579 

 530 

 402 

 580 

 580 

 581 

 581 

 582 

 586 

 782 

 588 

 581 

 580 

 401 

 402 

 580 

 581 

 583 

 403 

 581 



576 

 576 



417 

 581 



574 

 576 

 576 

 100 



841 



841 

 53 



117 



71 

 71 

 72 

 75 

 71 

 72 

 227 

 345 



71 

 75 

 71 

 71 



Reference 

 Theodolite(s)— Continued. No- 



Stability necessary during observations 2215 



Sun's rays, protection from _ 2215 



Thennocline(s) 



Definition. 632a 



Diurnal , definition 632e 



Sound wave, effect of on 6.32a 



Stationary 



Definition 6.326 



Depth of 6.326 



in coastal waters.. 632c 



Summer 



Definition. 6326 



Depth of 6326 



in coastal waters 632c 



Velocity of sound, effect on 6.32a 



Thermograph, sea water 478 



Thermometers, deep-sea (see also Reversing 



frame, thermometer) 471 



Depths measured by 4715 



Protected reversing type -- 4711 



Calibration of 4712 



Degree-volume of 4712 



Description 4711 



How graduated 4711 



reversed by messenger... 4722 



standardized for serial temperature observa- 

 tions. . 6321 



Unprotected reversing type. _ 4715 



Three-arm device for plotting R. A. R. by dis- 

 tance differences 6826C 



Three-barrel buoy, description 2826 



Three-letter station names (list) 

 Three-point flx(es) (see also Position, hydro- 

 graphic, and Sextant angles) 965 



Buoy anchors located by 2511 



from eccentric observation station 2511 



Buoys as objects in 3.337 



Relative strength of .3337 



Center object near, disadvantages 3333 



Change of objects in 3334 



Check angle required 



{366 

 766 



when locating control buoys.. 2511 



Chronological description of a 3441 



close to stations, plotting 7623 



computations - {2511 



Control buoys, check -angle required in locat- 

 ing. 2511 



Control stations on opposite shore used. 3333 



Control station selection for 3333 



(3321 

 333 



Description, specific, of a 3441 



Detached , check angle required j^gg 



Distant control stations combined with near- 

 by stations 3333 



Distant objects 



Difficulty of identifying when approach- 

 ing from seaward 3.3766 



Retention of faint 3334 



D uties of personnel in tak i ng 3441 



Eccentric . computation 2511 



Hills and mountains used as objects 3336a 



Inadequate , protracting. 7625 



{.3333 

 3336 



Indeterminate 3332 



Additional control data at 3.333 



Protracting 7625(c) 



Inshore ends of sounding lines, at 3454 



Inshore 3.335 



Measuring sum angle of 4522 



Nearby objects used 3335 



Observing precautions for small angles.. 3335 



Orders and communications connected 



with 3441 



plotted without protractor (see " Circle" sheets) 



Plotting where a control station is off 



the sheet 4536 



Plotting with three-arm protractor 4534 



Principlesof ._ 3331 



Protracting inadequate 7625 



Protracting 762 



Range azimuths determined by 3833 



Ranges with shore stations used to locate 



buoys --.- 2513 



Recording , approved method I. ^yg 



"Revolver" 3332 



Protracting 7625(c) 



Shore objects used 3334 



Small angles to be accurately observed .3333 



Page 



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 72 



576 

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 576 



577 

 577 

 577 



577 

 677 

 577 

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400 

 403 

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 401 

 402 

 401 

 401 

 406 



520 

 403 



644 

 170 



887 

 112 

 112 

 220 

 220 

 218 

 219 



282 

 711 

 112 

 259 

 700 



112 

 218 

 217 

 215 

 216 

 259 

 282 

 711 



218 



236 

 219 

 259 

 112 

 220 

 701 

 218 

 219 

 217 

 218 

 702 

 263 

 219 

 369 

 219 

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260 



377 

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 701 

 699 

 300 



114 

 764 

 754 

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 702 

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 217 



