From WebRef.org
Jump to: navigation, search
Line 2: Line 2:
  
 
[[Category: Anthropology]]
 
[[Category: Anthropology]]
 +
[[Category: Archaeology]]
  
  

Revision as of 12:33, 4 September 2019

geophysical methods of underwater survey include (1) a proton magnetometer towed behind a survey vessel, so as to detect iron and steel objects which distort the earth's magnetic field; (2) sidescan sonar that transmits sound waves in a fan-shaped beam to produce a graphic image of surface features on the sea-bed; (3) a sub-bottom profiler that emits sound pulses which bounce back from features and objects buried beneath the sea floor.