(b) Salinity (two inter- 0-25°/o00 +0.01°/o00 
changeable modules) 25-45°/o00 +0.01°/00 
(c) Nitrate-Nitrogen 0-50 microgram atoms/ +0.1 microgram atoms/ 
liter liter 
(d) Phosphate-Phosphorus 0-5 microgram atoms/ +0.01 microgram atoms/ 
liter liter 
(e) Silicates 0-200 microgram +0.1 microgram atoms/ 
atoms/liter liter 
(8) Total Magnetic Intensity 20,000-100,000 gammas +0.1 gamma 
Notes Sensor Time Responses: All sensors should have a 95% response to a 
step function in a period of 1 second. 
(£) Recording and Readout: 
The system shall be designed so that the above data will be read 
directly into the Master Shipboard Data Logging and Processing System 
either continuously (time-series) and/or intermittently. 
(g) If multi-conductor electric cable is employed, this cable and the 
various sensors associated with this system shall be compatible and use- 
able in conjunction with the Multi-Purpose Constant Tension, Heavy Duty 
Oceanographic Winch, described elsewhere. 
(h) Sensors shall be constructed in modular form, with simplicity so 
that they can be easily repaired and/or replaced at sea. 
Potential Users and Estimated Number of Units Which They May Require: 
a.» U. S. Navy (basic research, applied research, and oceanographic 
survey ships) - 20 to 40 
b. U. S- Coast and Geodetic Survey - 10 to 20 
ce. Certain activities within Scientific Community - 10 to 20 
d. Bureau of Commercial Fisheries - 2 to 10 
e. U.- S. Coast Guard - 10 to 20 
Total: 52 to 110 
Recommendation Where Instrument Should Be Researched and Developed: 
U. S. Industry. 
Relative Importance to U. S. National Oceanographic Programs: 
Instrument System priority l. 
38 
