The distance traveled is displayed by four counters which record the 

 distance traveled in each cardinal direction. Velocity over the bottom is also dis- 

 played digitally in the north-south and in the east-west directions. The ship's 

 heading is indicated by a gyro repeater unit. 



The vessel's track is traced on standard navigational charts by an x-y 

 plotter to a resolution of 0.001 nautical mile on a chart scale of 1: 10,000. The 

 direction and scale factors are set by scaling circuits as required. 



REFERENCE 



Correspondent and data furnished by Janus Products, Inc. , of Syosset, New York, 

 and Raytheon Company, Submarine Signal Division, Portsmouth, Rhode Island. 



102 



arthur ai.lLittlc-Jitf. 



