INDEX 



Page 918 



Reference 



No. I'iige 



Lighted ranges (s«e Ranges, navigation) 



Lighthouses {see Aids to navigation, fixed) 



Lighthouse Service, use of submarine bells fill 555 



Lightship symbolization 7842 740 



Lights, navigation (see Aids to navigation, 



fixed) 



Lights, special, to indicate survey activities 158.5 45 



Light structures, abandoned 7841 740 



Lime {see also Whitewash) 



Deterioration of 276 Itil 



Limits, boat-sheet 3222 205 



Limits of unsoundable areas, data required 3244 209 



"Line begins," Sounding Record requirements- 815(a), (b) 766 



Line of echo soundings - 563 540 



Line of position (see also Astronomic lines of 

 position) 



by radio bearing 4441 347 



in fixed-position control 3.3 212 



Line of soundings {see Sounding line) 



Lines of text, numbering in Coast Pilot 916 835 



Line, sounding {see Leadline) 



"Line iurns," Sounding Record requirements _ 815{^) 766 

 List of geographic names in Descriptive Re- 

 port 165 50 



Locations by sextant. Sounding Record re- 

 quirements 3244 209 



Lockerbie scale 4823 425 



Accuracy attainable with _ 4823 425 



Description 4823 425 



Scaling positions with .-_ 4823 425 



Locus of an angle used as a proposed sounding 



line --- 3143 200 



Log(s),ship 445 .349 



calibration {see also Logs, ship, factor, and 



Logs, ship, rating) 4454 35 



Maximum current that can be disregarded. 4454 351 



methods 4467 359 



units 445 349 



Changes in course, to be read at .. 3373 235 



Chernikeef {see Log, ship, electric sub- 

 merged) 



„ , , . , . /3374 235 



Dead reckoning, use of m 13381 238 



distances to supplement taut-wire traverses. . 2562 139 



Electric submerged 4452 350 



. , , f3374 235 



Advantages .(4452 350 



Description 4452 350 



Precautions in using 4452 350 



factor 



, f3372 234 



Accuracy ..(gggl 238 



Current, eliminating {formula) 4454 352 



Decimal places required 4454 352 



determination 4454 351 



for use in plotting 7651 709 



from graphic scale 4827 428 



scale 4827 428 



Construction 4827 428 



Method of use..-- 4827 428 



Purpose 4827 428 



Hydrography, use of in 4453 351 



Meridian (see Log, ship, electric sub- 

 merged) 



Patent {see Log, ship, taffrail) 



Rating {see also Logs, ship, calibration, 



amd Logs, ship, factor) 4454 351 



Current efTect on 4454 351 



Current, eliminating (/orniMZo) 4454 352 



for various speeds 4454 351 



Precautions necessary 4454 351 



When required 4454 351 



Taffrail ... .- 4451 349 



Care . . .. . 4451 350 



Cleaning and oiling 4313 332 



Description 4451 349 



fouled by refuse thrown overboard 4453 351 



logline length 4451 349 



Log loss in dead reckoning 3374 235 



Streaming 4451 350 



Survey buoy, fouling on 3374 235 



Two to be used 4453 351 



Log booms affecting navigation 916 835 



Lookout to be kept when surveying dangerous 



waters 3465 267 



Lookout tower, definition 8534C 803 



"Lost" triangulaton stations 225 78 



Use in changing survey-sheet datums -- 7364 680 



Loud-speaker communication system.. 4111(/) 316 



ot the Explorer 4121 320 



Low tide, shoals to be examined at 3661 283 



Low-water line ^ 



Definition (754 gg^ 



465382—44 59 



Reference 

 Low-water line— Continued. ^ °- 



determined by 



f3532 

 soundings 1754 



topographer 754 



Development of - 3121 



Soundings near on smooth sheet - 7725 



, V, Kf t /7713(«) 



to half feet \7715 



symbolization on smooth sheet 754 



Unsounded 



Record in Sounding Record 3122 



13122 



Report in Descriptive Report 18426 



Loxodromes HI 



Lubber's line of a compass 4411 



Lyrionia 

 First Dorsev Fathometer No. 1 installed 



on-^ 5134 



First Fathometer installed on 5132 



Lyle gun, use in laying hyrophone cable 263a 



M 



Machine, drafting, universal 4851 



Machine, erasing, electric 4852 



Machines, sounding {see Sounding machines) 



Magazine, ammunition, care of 666 



Magnesium carbonate, for cleaning cellulose 



acetate 7143 



Magnet, heeling, adjustment . 4414(9) 



Magnets, compass 4411 



adjustment - 4414 



Magnetic 



anomaly 1216 



evidenced by discrepancy between magnetic 



and gyrocompass. .. . — 442 



declination, cyclic changes 476 



declination, definition 4413 



metals kept from magnetic compasses 4412 



observations {see also Compass) 



at sea from a small boat 153 



Shore , instructions for 1216 



Shore , interval requirements 1216 



storms 4415 



Magnetostriction, principle of 5161B 



Magnetcstrictive transmitting and receiving 

 * unit(s) {see also under name of spe- 

 cific instrument) 5161B 



Contact with water 5162 



Description 5161B 



Energy for 5161B 



frequencies 5161B 



Metal used in 5161B 



Mail shipments, weight limitations 836 



Mangrove limits, symbolization 752 



Manuals, field work, C. & G. S 114 



Manuals, field work, C. & Q. S. {list) 952 



Manuscript 



Checking 916 



Italics, use of 9136 



Marking for printing 9136 



{9135 

 916 

 Map(s) 

 data of other organizations 



evaluated by Chief of Party 834 



transmitted to Washington OflSce 834 



Local {see Maps, projeetionless) 



measure (instrument) . 4833 



Advantages 4833 



conversion table 4833 



Description 48.33 



Use 4833 



Miscellaneous , requirements for corre- 

 lation 916 



Planimetric (see Air photographic sur- 

 veys and Planimetric maps) 



Projeetionless -. 2361 



Control points to be determined 834 



Constructing projections on 737 



Field inspection to be made of— 2361 



Field work needed to control 2361 



Identification of 2361 



Information to accompany submitted .. 2361 



Landmarks on to be independently 



located 2361 



Requirement s for correlation 916 



supplementinf!; topnsniphic surveys 2361 



scales and e'liiivali'iits {tnhle ^0) 963 



Marc Saint Hilaire method . 3382 



Marconi Company echo-sounding instruments.. 5324 



Marginal continental features, terminology 1681a 



Marigram, tide reducers from 8224 



Marine vegetation affecting navigation 916 



Marinus of Tyre HI 



Page 



271 

 694 

 694 

 193 

 721 

 715 

 715 

 694 



194 

 194 

 788 

 2 

 335 



442 

 441 

 150 



433 

 434 



623 



663 

 337 

 335 

 337 



339 

 413 

 336 

 336 



38 



12 



12 



339 



449 



449 

 451 

 449 

 450 

 450 

 450 

 785 

 693 



828 



821 

 821 

 815 

 836 



783 

 783 



430 

 431 

 431 

 430 

 431 



783 

 680 

 94 

 95 

 94 

 94 



95 

 826 



94 

 884 

 239 

 502 



54 



773 



833 



1 



