Tabl 



e. Characteristics 



of seismic prof 



iling systems. 



System 



Frequency Power output 

 range 



(J) 



Resolution 

 (m) 



Sediment 



penetration 



(m) 



Application 



Echo sounder 



12 to 200 kHz <0.5 



0.1 to 0.2 



Minimal 



Measure accurate water depths 

 and Identify suspended mud areas. 



Plnger 



2 to 14 kHz 0.1 to 5 



0.2 to 1 



<30 



Measure water depths and provide 

 very high resolution of the shallow 

 suhbottom. 



Boomer 



14 to 300 117, 100 to 1500 



0.5 to 2 



5100 



Measure approximate water depths 

 and provide high resolution and 

 moderate penetration of the sub- 

 bottom. 



Engineering 

 sparker 



200 to 1500 Hz 50 to 1200 



1 to 2 



<150 



Especially useful in "hard bottom" 

 sea floor areas to get moderate 

 resolution and moderate penetration. 



EAST 



S6a bed- 



Sufsed 0stck 



Outcrop of glacfel 



sediments 



WEST* 



Figure 2. Example ORE Pinger (3.5 kilohertz) profile. Timing line 

 interval is 5 milliseconds «7.5 meters in upper sediment 



layer . 



11 



