subject of hydrological range are presently conceived to be 

 primarily useful in the design of UW-TV equipment. It is hoped 

 that these empirical data will provide the assistance you required. 

 (See also pages 227 - 228.) 



MR. SAM O. RAYMOND (Edgerton, Germeshausen & Grier, Inc.): 

 Does the National Oceanographic Data Center have, or does it 

 plan to have, a library of deep sea photographs taken in various 

 parts of the oceans of the world? 



MR. H. W. DUBACH (NODC): Yes. We have already acquired 

 a few such pictures; those obtained to date are primarily of in- 

 terest to the marine geologists. We expect that in the next decade 

 there will be nnany more bottom photographs obtained and sub- 

 mitted to us as well as pictures of biological life and ice. 



MR. R. P. SHAW (Philco Corporation): Does there exist a sat- 

 isfactory equation of state for water relating pressure, volume, 

 temperature, and entropy or enthalpy; and, if so, does it explain 

 why sound speed increases, then decreases with temperature? 



MR. F. D. JENNINGS (ONR): There is an equation of state for 

 sea water and this has been related to entropy and enthalpy by 

 N. P. Fofonoff. This subject was widely discussed at the 1958 

 meeting in Easton, Maryland, on the Physical and Chemical 

 Properties of Sea Water. The Proceedings of that meeting were 

 published as: Physical and Chemical Properties of Sea Water, 

 National Academy of Sciences -- National Research Council, 

 Publication No. 600, 1959. Whether or not the equation of state 

 for sea water is satisfactory is a matter of some disagreement 

 among oceanographer s . 



In reality, the velocity of sound only increases with tem- 

 perature. The minimum sound-velocity channel in the oceans 

 is caused by the combined effects of temperatures, pressure, 

 and salinity. 



MR. NATHANIEL SHEAR (Emerson Research Laboratories): 

 Administratively, how is the funding for oceanographic instru- 

 ments handled? 



MR. T. J. WEHE (HO): At present, funding is generally by 

 the using agency insofar as purchase of production items is 

 concerned. 



251 



