Page 482 - Green - Maritime Archaeology: A Technical Handbook. 2nd ed

Index 461 LM
Land-based wreck trails, for CRM, 379 Land survey party, and transits, 31, 33 Laser printer, for lettering, 311 Layback principle, 69f
Least-squares adjustment technique
in computer-based surveying, 119–121 in three-dimensional survey, 108
Legislation
and amateur divers, 400
in Australia, 401
conservation concerns, 400–401 enacting, 398–399
opposing interests, 398
and Receiver of Wreck, 401–402 treasure hunter governmental
agreements, 403–404
treasure hunter profit motives, 399–400 and treasure hunters, 399
and underwater cultural heritage, 369 UNESCO’s fourth Heritage Convention
overview, 404–406
in United Kingdom, 401–402 in United States, 401–403
Letraset, for lettering, 311
Lettering, in artifact drawing and plans,
310–311 Leveling
back and fore readings, 117f
in profiling, 112–117
Library of Congress, in archival research, 16 Lifting, in excavation
bag sizes, 271f
commercially available bags, 271–273 deep-water lifts, 273
Ko Si Chang wreck site, 269f
limited resources, 270–271
murky conditions, 273
overview, 267–268, 270
towing, 273
vessel stability parameters, 270 working platform, 268
Line of sight, Site Surveyor problems, 126 Local knowledge, in search and survey,
84–86 Looting
basic problems, 5
Mediterranean sites, 7
and underwater cultural heritage, 368
Lossen wreck site, 121
Magnetic compass, in distance-angle survey, 92
Magnetic field
anomaly cross section, 63f magnetometer measurements, 62
Magnetometers
aerial magnetometer, 69–73 close-plot survey
Amsterdam wreck site, 160f Cape Andreas wreck site, 161f Kyrenia wreck site, 159f, 160f overview, 158–159
example device, 66f principles of operation, 62–64 search considerations, 64–68 sensitivity, 68–69
Mapping program, photomosaics, 181 Maps
contour magnetic map, 67f georeferenced historical map, 210f orthographic map, 29
topographic map, 29
transit identification, 29, 31 Virtual Mapper, 193, 201
Margarita wreck site, 403
Marine Sonics, side scan interface, 78f Marine survey teams, and transits, 33–34 Maritime archaeology basics
code of ethics, 9–10 definition, 2
as discipline, 5
early criticism, 3
educational dimension, 11 Global Positioning System, 1 leading journal, 11
proper methodology, 2
as scientific discipline, 10 site management issues, 3 site ownership, 9
Maritime wreck trails, CRM, 382–383 Martin depth-measuring device, in profiling,
115f
Mary Rose wreck site
application of direct survey method system, 121
computer-based survey, 118 photo, 364f
raising, 8
replica, 361