SUPPORTING SERVICES 99 



copies supplied to other oceanographic institutions on an 

 exchange basis. 



The chart library, which serves as the Department of Defense 

 Nautical Chart Library, houses perhaps the largest and most up- 

 to-date collection of nautical charts in existence for the oceans 

 and the foreign waters of the world. This working collection is 

 used primarily as source and reference material in the compilation 

 and revision of nautical and aeronautical charts and navigational 

 publications. 



Original manuscripts of all U. S. Navy hydrographic surveys 

 dating back to the mid-19th century are available for reference 

 at the National Archives in Washington, D. C. As a rule, the 

 field survey sheets, or "smooth sheets" as they are commonly 

 called, are on much larger scales than published nautical charts 

 of the same area and show a greater degree of detail. They 

 thus provide an invaluable unpublished data source for research 

 and ocean engineering and development purposes. 



COMPUTER PROCESSING OF DATA AT NAVOCEANO 



The main computers within the Naval Oceanographic Office 

 are an IBM 7074 with 10,000 words of core memory and a CDC 

 3100 with 16,000 words of core memory. Smaller specialized com- 

 puters include a CDC G15D with drum memory for low volume 

 geodetic problems, a CDC 8090 used principally to tape weather 

 data from a teletype circuit, and a TRW 130 (AN/UYK) for 

 checking out shipboard programs. Computer systems of other 

 activities which are used regularly by NAVOCEANO are IBM 

 7090/7094, CDC 3800, and CDC 1604. Other specialized outside 

 equipment, such as the SC 4020 Cathode Ray Plotter, is used for 

 several projects. 



A number of CALCOMP general purpose plotters and a Benson- 

 Lehner plotter are used for many applications. For automated 

 high precision charting, a large Concord Control Plotter is available. 



Computer programming is provided by staffs of mathematicians, 

 analysts, and programmers for both in-house and shipboard 

 systems. Open shop instructions are given to scientists and 

 engineers who wish to program in FORTRAN. A library of 



