Echo chamber
Russell, H.
Echo chamber - 1994 - New Civil Engineer (1071) 27 January 1994, 31-32(2) .
Explains how underground surveying specialist, Geosonde, investigate flooded mines with sonar equipment.
ABANDONED MINE WORKINGS
DISUSED LIMESTONE MINES
FLOODED MINES
GEOSONDE
LASERS
MINE PLANS
MINES
MONITORING
SONAR EQUIPMENT
SONAR SURVEYING
Echo chamber - 1994 - New Civil Engineer (1071) 27 January 1994, 31-32(2) .
Explains how underground surveying specialist, Geosonde, investigate flooded mines with sonar equipment.
ABANDONED MINE WORKINGS
DISUSED LIMESTONE MINES
FLOODED MINES
GEOSONDE
LASERS
MINE PLANS
MINES
MONITORING
SONAR EQUIPMENT
SONAR SURVEYING