probably would be to divide the instrumentation requirements into 

 four categories depending upon the type of platform used and to 

 develop a compatible sensing, recording, and transmitting system 

 for each. These categories include: (1) A basic synoptic system 

 for ships generally positioned continuously in a given area; e.g. , 

 ocean station vessels; (2) an underway shipboard system which 

 will essentially be a modified version of the basic synoptic sys- 

 tem for ships of opportunity and fleet vessels; (3) an oceanogra- 

 phic aircraft system; and (4) a long-life, long-range, moored, 

 telemetering station. To achieve these requirements, it has been 

 necessary to support the development of individual instruments to 

 fit into the various systems, as has been mentioned earlier. In 

 addition, a certain amount of specialized instrumentation will be 

 required which does not properly fit into these four categories at 

 the present stage, either because they are not truly synoptic 

 instruments or because they have special requirements of their 

 own. 



Figure 12. 3 attempts to show the requirements of the synoptic 

 survey system. It should be mentioned that this diagram is merely 

 intended to be symbolic and involves no intent to influence the ul- 

 timate designer of the system. The basic requirements, as indi- 

 cated by Captain Fusselman, are also outlined in the figure. 

 Temperature, sound velocity, and conductivity to a depth of 2, 500 

 feet are to be measured and recorded in three modes: Visual, 

 digital for transmission, and magnetic for permanent storage and 

 research use. The system should be completely remote-controlled 

 and simulate an all-weather system as much as possible. About 

 30 of these systems will ultimately be required for a service test 

 version of ASWEPS; more will probably be necessaj-y as the 

 ASWEPS program expands. Though procurement action of this 

 item has not been initiated, it is planned in the immediate future. 

 A 2-year development contract is visualized with the prototype to 

 be delivered by the end of fiscal 1963. 



Figure 12.4 illustrates a nnodified version of the synoptic 

 system required for fleet vessels and ships of opportunity. Consi- 

 derable success has been achieved in the ASWEPS program by use 

 of MSTS commercial vessels as bathythermograph platforms. If 

 the synoptic system capability can be extended so that data can be 

 obtained at speeds of 12 to 15 knots, such platforms will be highly 

 efficient contributions to the program. This system is expected 

 to be able to reach depths of 1, 500 to 2, 000 feet and to measure 

 temperature and sound velocity in a form suitable for transmission 



132 



