ACOUSTIC GROUND DISCRIMINATING RADAR
- An extra processing unit which can be used in conjunction with single beam echo sounders to determine the roughness and hardness of the seafloor. Mainly used for marine biology, but has been used in archaeology.
- English Heritage
- http://creativecommons.org/licenses/by/3.0 (FISH Event Types Thesaurus)
- http://www.english-heritage.org.uk (FISH Event Types Thesaurus)
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