of position in the record of many of the geophysical parameters is 

 highly desirable. 



The Hydrographic Office has an additional requirement for a self- 

 contained airborne navigation and positioning system of world-wide 

 capability. 



This Office has a requirement for an accurate ranging instrument 

 for use from ship to ship or ship to buoys over distances of 50 feet to 

 10 miles. The prototype of an instrument that appears to meet this 

 requirement has been developed by the Diamond Ordinance Fuse 

 Laboratory. The Bureau of Ships should be encouraged to obtain one 

 of these instruments for further field evaluation by this Office. 



The Hydrographic Office should follow closely developments in the 

 application of satellites and rockets to positioning and participate in 

 developmental projects as opportunities arise. 



R. WINCHES AND HOISTS 



The Hydrographic Office has a requirement for oceanographic winches 

 which can be readily put aboard ships for short periods to meet special 

 survey requirements. The most frequent requirement is for one 

 with a relatively small drum capacity of about 5,000 feet of 3/32 inch 

 wire. However, requirements also exist for one with a capacity of 

 about 15,000 feet of 5/32 inch wire. 



The development and field evaluation of a suitable electrical cable 

 reel should be given a high priority. The immediate requirement is 

 for a reel with a capacity of 6,000 feet of 0.3 inch three- conductor 

 wire or 2,500 feet of 0.5 inch eight- conductor wire. It should be 

 designed with ten slip rings to provide a margin for failures and to 

 allow future use of cables with as many as ten conductors for simul- 

 taneous measurements of several oceanographic factors. A longer 

 range requirement is for a cable reel with the much greater capacity 

 of about 10,000 feet of 0.4 inch eight- conductor wire and as many as 

 ten slip rings. 



Requirements for deep-sea anchoring winches will vary with each 

 type of ship and should be made known when construction or modifica- 

 tion of ships for oceanographic work is planned. 



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