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This thesis is a proposal for an automated, real time navigation system which will be used in a close coastal and harbor navigation environment. Special consideration was given to designing the system in such a manner that the present system of navigation would be retained - no personnel would be either added or removed from the ship's complement, all logs and records would be retained in their current form, and the piloting routine would not be changed. When the system is functioning as designed, real time navigational data will be generated which will be verified by the slower manual plotting method. Should mechanical failure occur, the manual plot already being maintained will take over. The system design calls for installation of a commercially available desk-top microcomputer with CRT display devices located in remote locations for dissemination of data. The cost of the complete system is less than $4000, and repair is effected by replacement of modules drawn from onboard spares. Considerable flexibility is retained for later changes and additions to the system should such be desirable. (Author)