PRECISION NAVIGATIONAL CONTROL SYSTEM 
FOR OCEANOGRAPHIC SURVEY OPERATIONS 
Sketchs 
(To be provided) 
Primary Use: 
To be utilized by oceanographic survey ships for obtaining precise 
Navigational positioning incidental to routine oceanographic surveys 
and/or special oceanographic investigations. 
Requirements and Specifications: 
a. To be utilized on oceanographic survey ships in the conduct of 
routine oceanographic surveys and special oceanographic investigations. 
b. To be utilized in both coastal and oceanic operations, day and 
night, and to have an all-weather capability. 
c.- THe system operation must be reliable, i.e., have an on-the- 
air time in excess of 95% and signals must be free of any ambiguity. 
d. To be readily adaptable to automatic plotting of position on 
a plotting sheet. 
e. To be designed to support a dual-range operational capability 
as follows: 
(1) Short range (0-200 miles); accuracy +50 feet 
(2) Long range (0-5,000 miles); accuracy +3-1 mile. 
f. Shipboard system to be designed emphasizing modular construction, 
compactness, ruggedness, and ease and simplicity of operation and mainte- 
nance. In any case, ship's crew should be able to operate and service 
the system at sea without extensive specialized training. If feasible, 
both short and long range systems should be incorporated into one console. 
ge "Position" information obtained from both of these systems must 
be capable of being read automatically into the Master Shipboard Data 
Logging and Processing System simultaneously and in conjunction with 
any environmental data. 
Sy 
