Page 489 - Green - Maritime Archaeology: A Technical Handbook. 2nd ed

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Index
Survey systems, see Acoustic surveying systems; High Precision Acoustic Surveying System; Three-dimensional survey techniques; Two-dimensional survey techniques
Swath bathymetry side scan, 76f Sweden, wreck registers, 15 Swim-line
boat deployment, 52f overview, 51–53 schematic at Cyprus, 53f search path, 54
visibility, 54
Tape measurement control point data, 198t on land, 154t
Team size, in research preparation, 20 Technical field photography
overview, 231–232 predisturbance site survey, 232 types, 232
Tektash wreck site
base operations, 187f
contour plan from stereophotographs,
194f
grid lines in excavation, 239f
hand fanning into airlift, 254f PhotoModeler application, 186–187 Rhinoceros, 202f, 203f stereophotogrammetry, 193 telephone booth, 246f
Temperature, in HPASS survey of HMS Pandora, 135–136f
Theodolite measuring system
Cape Andreas, Cyprus, 107f
and distance measuring system, 41 double theodolite system, 40 photographic angle measurement
comparison, 40 in 3D survey, 106
Thermal lance, for Xantho excavation, 265f Three-dimensional drawing packages,
artifact drawing, 293 Three-dimensional graphics, artifact
drawing, 318–319 Three-dimensional survey techniques
angular measurement, 104, 106 least-squares adjustment, 108 overview, 100–101
profiling, 109–117
rectangular coordinate survey, 101–104 trilateration, 108–109
Tides, transit effects, 29
Tilt correction, in square grid frame, 179f Tilt correlation, in photomosaics, 176 Titanic wreck site, submerible searches,
60
Topographic map, transit identification, 29 Total Station
function, 42
in operation, 43f Towed search
Correio da Azia wreck site, 56f overview, 55–57
systems, 74
Trail plinths, marine-based CRM programs, 383f
Transits
artifical network on beach, 33f Bunbury whaler site, 30f
cocked-hat effect, 28
definition, 24
fixed position relocation, 27 identification in aerial photograph, 29 identification on maps, 29
large scale maps, 29, 31
and marine survey teams, 33–34 photo transits, 26f
straight line course, 25
and systematic search pattern, 31, 33 tide effects, 29
working diagram, 25f
wreck site relocation, 28–29
Treasure hunters
and asian sites, 8
and cultural resource management,
376–377
governmental agreements, 403–404 and legislation, 399
looter comparison, 5–6
profit motives, 399–400
Treasure Salvors
Atocha wreck site, 403 Margarita wreck site, 403
Trench system
excavated square, 241f
as grid frame alternative, 240
Trial wreck site preparation work, 19–20 team size, 20
T