MARINE SEISMIC RECEIVING SYSTEM 
Sketchs 
(To be provided) 
Primary Uses 
To be utilized on oceanographic survey ships to measure and record 
the various characteristics of the structure of the sea floor as 
applicable to acoustical propagation studies of the water volume, the 
bottom sediments, and the underlying structures. 
Requirements and Specifications: 
a. To perform reliably on oceanographic survey ships, in sea states 
of O through 5, with ship stopped ("lying-to"). 
b. To be operable in coastal and oceanic regions, in water depths of 
O to 6,500 fathoms. 
c.- To be designed so that the equipment is portable, compact, rugged, 
simple, requiring minimum maintenance, and readily and easily transferable 
from one ship to another. 
d. The receiving hydrophone must be so designed as to permit reliable 
detection of shots as far as 100 nautical miles away. 
e. Receiving hydrophone frequency: 
(1) Range: O to 10 KCS 
(2) Accessory Filters: 
(a) Filters to permit the selection of high frequency band 
(usually greater than 4 KCS) for the resolution of thin-bedded strata. 
(b) Filters to permit the selection of low frequency band 
(usually lower than 500 C.P.S.) for maximum penetration of the sediments. 
f. Data recording and readouts 
(1) Data to be directly read into the Master Shipboard Data 
Logging and Processing System. 
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