212 OCEANOGRAPHY 1961 — PHASE 3 



generally will give control to the order of a few hundred feet. We 

 could get accuracies of 300 feet at about 500 miles from the shore. 



Now, most of these methods are not suited to distances beyond about 

 500 miles. But in the closer inshore areas, we have to be able to locate 

 within a few hundred feet in order that the oil company client shall 

 be able to return to the site and drill its well in the proper location. 

 It would be tragic indeed if they missed by 1,000 or 2,000 feet and lost 

 an oil well by that reason. 



Mr. Bauer. Now, one further question along the same line : When 

 you move from country to country, do you carry your own means of 

 establishing geodetic control with you, usually ? 



Mr. Savit. About half the time we do. Other times we use exist- 

 ing geodetic controls, if available. If not, we have to carry our own.. 



Mr. Miller. You have to put up your own loran installations ? 



Mr. Savit. We have to put up our own antennas. Our company 

 magazine at one time showed a camel -back expedition where some of 

 our people had to go by camel for 12 days in Baluchistan to set this; 

 thing up. 



Mr, Bauer. In the Persian Gulf you are using Decca ? 



Mr. Savit. Yes. 



Mr. Bauer. And all of your survey work has had close geodetic 

 control ? 



Mr. Savit. That is right. 



Mr. Miller. I am afraid this is all we can do. Those bells are very 

 emphatic, you know. There is little we can do about it. 



Mr. Romberg and Dr. Mott-Smith, could you come back tomorrow 

 morning? 



Mr. Romberg. I am due to go to a physical society meeting in, 

 Mexico. 



Mr. Miller. If you have a prepared statement, may we have it ? 



Mr. Romberg. Yes, sir. 



Mr. Miller. We will file it for the record. 



(The statement referred to follows:) 



Memorandum 



June 16, 1961. 

 To : Dr. F. Gilman Blake, Jr., Chairman, S.E.G., Subcommittee on Oceanography., 

 From : Mr. F. E. Romberg, S.E.G., Subcommittee on Oceanography. 

 Subject : Potential of geophysical exploration industry for oceanographic in- 

 strumentation. 

 Outline : 



1. Geophysical instruments now used at sea : 



(a) Gravity meters. 

 ( & ) Magnetometers. 



(c) Acoustic arrays. 



(d) Data processing methods. 



2. Oceanographic instrumentation by the exploration industry : 



(a) Examples. 



(6) Development facilities. 

 •\, (c) Automatic recording, computing, storing. 



The exploration industry's potential for oceanographic instrumentation can 

 be divided into two categories, one for building regular geophysical sensors 

 for use at sea, and another for inventing and developing new instruments for 

 oceanography. In order to get into operation, the exploration industry invented 

 and built a variety of geophysical sensors for use in its regular operations. 

 T^Tien the search for oil led into the ocean, these were adapted for use at sea, 

 so that now seagoing gravity meters, magnetometers, and especially acoustic 

 arrays of advanced design are now in operation. Development of these instru- 



