Page 912 



INDEX 



Reference 

 Landmark(s for charts)— Continued. ^o- 



elevations required on smooth sheets 7844 



Form 567, instructions for preparing 8534/1 



Nomenclature (examples) _ _ 8534C 



Nomenclature standardized 8534C 



Planinietric maps, locating on 155 



recommended by hydrographer 7844 



Report required 8534 



Duplicate copy for Coast Pilot Section 8534 



Selection of 155 



shown on topograghic or hydrographic sheet. 7844 



Smooth-sheet identification required.. 17844 



symbolization 7844 



Terminology, approved 85340 



Triangulation location of 221 



Langevin 512 



Langevin-Touly electrolitic recorder (see also 



Echo-sounding instruments, French) 5311 



Laplace azimuths 223 



Latitude and longitude numbers on smooth 

 sheets 



Placement--.- 7323 



Size 7323 



Latitude and longitude scales (see Scales, lati- 

 tude and longitude) 

 Launches of the Explorer /^122 



Launch (es), fishing 



for hydrographic surveys 4233 



Hovr powered 4233 



Launch (es), hydrographic - 



Dangers to be surveyed in 361 



Drags used to slow down 3461 



speed while sounding 3461 



Launch(es), survey 42 



Characteristics of 421 



Dimensions of one of Explorer's 4211 



Equipment, survey, described 422 



General description 421 



Leased 423 



Bids for 4231 



Inspection report 4232 



Preferable type 4233 



specifications 4231 



Survey of 4232 



Leasing , procedure 4231 



Types used by C. and G. S. described 421 



Launch hydrographic party, personnel of 142 



Layout, sheet (see Sheet Layout) 



Leaders, use on smooth sheets 7914 



Leadline(s) 462 



Attaching lead to 4661 



Checking (see Leadline verification) 



comparison (see Leadline verification) 



Current, effect on 3464 



Depth changes disclosed by 3416 



Description 462 



Float attached to for use in surveying 



shoals 3664 



Heaving out the right length of 3421 



identification marking 4621 



length 4621 



marked in fathoms of feet, not both 4621 



marked in fathoms, standard marks 4621 



marked in feet, standard marks 4621 



marked under tension 4621 



Marking 4621 



Marking a new 4621 



Marking for use in checking \a^^ 



marks, how to attach-. 4621 



material 462 



Preparing for use 4621 



Preseasoning 4621 



should never be boUed 4621 



specifications 462 



Propeller, keeping out of -{346 



Re-mark , when to 4622 



Samson tiller rope 462 



Sinking rate 3421 



Sounding with , description 3421 



soundings (see Handlead soundings) 

 Standardization (see Leadline verification) 



stowed wet, when not in use 4622 



Straightening before reading depth 3421 



verification 14622 



by Recorder (sii* 



Errors found, recorded in decimals 4622 



Frequency requirements 4622 



Recorder responsible for 4622 



Recording 4622 



Recording in Sounding Record 8134 



Page 



741 

 801 

 804 

 802 



41 

 741 

 800 

 800 



41 

 741 

 734 

 741 

 741 

 803 



69 

 440 



500 

 75 



669 

 669 



320 

 323 



326 

 326 



276 

 264 

 264 

 322 

 323 

 323 

 324 

 322 

 325 

 325 

 326 

 326 

 325 

 326 

 325 

 323 

 29 



749 

 383 

 397 



266 

 253 

 383 



284 

 254 

 384 

 384 

 384 

 384 

 385 

 384 

 384 

 384 

 384 

 385 

 385 

 383 

 384 

 384 

 384 

 383 

 254 

 263 

 386 

 383 

 255 

 254 



385 

 254 

 256 

 385 

 252 

 757 

 386 

 385 

 385 

 385 

 760 



Reference 

 Leadline(s)— Continued. No. 



Weight of lead - 462 



Leadsman 



alternating with assistant 3416 



Assistant to , duties of 3416 



Canvas belt to support 4625 



Depth changes, warned of expected 3421 



Duties -- 3416 



Handlead soundings, how to take 3421 



Instruction in sounding- 4623 



Lookout, serving as 3416 



Leads, sounding... 466 



[3416 



Arming •^3841 



14664 

 Deep-sea {^^65 



Handlead 



Attaching to leadline 4661 



Sinking rate 3421 



Special for soft bottom 4663 



Weights of 462 



Pipe --. 4662 



Shaping bottom of 4661 



Sizes and weights 4661 



Weights used in serial temperature observa- 

 tions --- 6321 



Leaks in hydrophone cable, tests for 2613 



Leasing launches, procedure 4231 



Least depths (see also Dangers to navigation 

 and Shoals) 



Determination of 366 



determined by 



closely spaced sounding lines 3662 



drift sounding 3664 



feeling with leadline 3664 



wire-drag 3663 



Inking on smooth sheet 7866 



determined from an anchored boat 3664 



diflering consistently from prior data - - _ 3521 



(7732 



Emphasizing on smooth sheet •{7753 



17913 

 Former not verified, reported in Descrip- 

 tive Report 3521 



found 



by feeling with leadline- 366 



Data to be recorded - 366 



by wire drag need not be investigated 351 



Descriptive Report requuements 842iV 



visually 366 



from prior hydrographic surveys to be veri- 

 fied 3234 



from prior wire-drag surveys need not be 



verified 3523 



Inspection of on smooth sheet 7913 



Legend to accompany 7753 



Low tide, determined at 3661 



Sand shoals, requirements 367 



Shoalest soundings to be recorded 3433 



f7732 

 775? 



Smooth-sheet requirements < yigg 



[7913 



Sounding lines, systematic, not found /354 



on \3621 



Wire-drag clearance, allowable 3663 



Wrecks 365 



Ledge, definition ^^^ 



r782 

 Ledges, symbolization 17824 



Leeway on dead-reckoning sounding lines 3371(1) 



Legends (see Notes, explanatory) 



{81 

 811 

 Lenses, instrument 



Cleaning 4313 



Dusting 4313 



Leroy lettering set 4834 



Pen sizes for 7231 



Template size for control-station names 7442 



Lettering sets, mechanical 172.31 



Leroy , description 4834 



Pens, cleaning 4834 



Symbols, special, cut in templates 4834 



Wrico , description 4834 



Lettering, smooth-sheet 72 



Minute not used 723 



orientation 722 



Style 723 



with mechanical lettering set 7231 



Letters, day (see Day letters) 



Leveling at tide statioiLS 1433 



Lifeboatmen 1582 



253 

 253 

 388 

 254 

 253 

 2.54 

 386 

 253 

 397 

 253 

 301 

 398 

 398 

 410 



397 

 255 

 398 

 383 

 397 

 397 

 397 



580 

 149 

 325 



282 



283 

 284 

 284 

 283 

 744 

 284 

 269 

 722 

 729 

 748 



282 

 282 

 268 



789 

 282 



207 



269 

 748 

 729 

 283 

 285 

 258 

 722 

 729 

 744 

 748 

 271 

 277 

 283 

 282 

 55 

 736 

 734 

 736 

 233 



753 

 757 



332 

 332 

 431 

 664 

 690 

 431 

 664 

 431 

 432 

 431 

 431 

 663 

 664 

 663 

 664 

 664 



32 

 44 



