tivity. This instrument is considered extremely important. One 

 such device is currently being developed by the Bureau of Ships, 

 and the Hydrographic Office is participating in its procurement. 

 Although the proposed instrument is not a true synoptic tool, 

 resulting information will be of extreme importance to prediction 

 of effective performance of new sonar gear. A new type of current 

 meter will be required for synoptic purposes, and will be prinnarily 

 used in connection with buoys. Several devices which eliminate 

 the mechanical principle of present current meters have been 

 suggested; however, no procurement action has been taken. Sup- 

 port for development of such a meter is planned in the near future. 



WAVE HEIGHT 

 \NAVE HEIGHT RECORDER ±0.5' (0-40') 



INDEX OF BOTTOM REFLECTION 



y 



SOLID STATE" CURRENT DETECTOR i O02 KT (0-5 KTS) '7. 



SURFACE THERMOGRAPH 



GIMBAL ARRANGEMENT 



12.7 



FIGURE 



ADDITIONAL INSTRUMENTATION REQUIREMENTS 



137 



