Oceanographic Instruments and Systems That Should Be Developed, 

 Evaluated, or Further Investigated 

 B. E. Olson 



A. Requirements 



1. Develop a system for measuring and recording properties and 

 movement of water in situ that includes: 



a. Thermal element 



b. Depth element (for determining depth of instrument) 



c. Current sensing element 



d. Transparency probe 



e. Conductivity and salinity sensing elements 



f . Indicating and recording system to be used with the foregoing 

 elements 



2. Develop an acoustic device for telemetering information from the 

 foregoing devices to a surface vessel, or to a surface buoy for relay by 

 radio to a vessel or a coastal station. 



3. Select the best device available for measuring bottom-pressure 

 fluctuations generated by waves, and investigate the possibility of 

 adapting it to the same system developed for measurements covered 

 by item 1. 



4. Investigate the availability of a micro- altimeter suitable for use 

 aboard ship in combination with an accelerometer for obtaining wave 

 measurements while underway. 



5. Conduct a full-scale investigation of the accuracy of the bathyther- 

 mograph and the feasibility of extending measurements to greater depths 

 (2,000 to 3,000 feet). This should include inquiry into whether winches and 

 wire allowances are consistent with depths attainable by the 900-foot 

 BT. 



6. Explore in detail the requirements for, and the means of achieving, 

 a geophysical measuring and recording system. 



7. Conduct a full-scale evaluation of the Roberts Current Meter, its 



Encl. (2) to Code 5401-BEO/bah memo of 23 Jul 1958 



B-7 



