AEROGRAPHER'S MATE 3 & 2 



Copy and Transmit System. 

 Electronic interface between high 

 speed data line and low speed 

 teletype line. 



Figure 



9-5. — NEDN Collect 

 (CAT). 



209.349 

 and Transmit Unit 



of the plotter reveives the parallel data from 

 the OLDS and produces maps through the op- 

 eration of the pen up/pen down, drum up/drum 

 down, and carriage right/carriage left func- 

 tions. 



Once the plotter has received the informa- 

 tion from the OLDS unit, it will rapidly draw 

 lines on the chart roll with a series of move- 

 ments. The paper roll will move 0.01 inch 

 per step, while the pen will move only from 

 side to side or up and down. 



The CALCOMP digital plotter consists of 

 a drum type plotter and an electronic controller 

 (OLDS logic unit) mounted on a single bedplate. 

 (See fig. 9-6.) 



Data Systems Technicians (DS) and/or civilian 

 technicians are normally assigned to NEDN activ- 

 ities 6olely to maintain the computers and as- 

 sociated equipment. It is not, and should not be, 



OLDS IS CONTAINED IN BACK 

 PORTION OF PLOTTER 



PEN ASSEMBLY 

 (SOLENOID) 



DIGITAL PLOTTER 



RECEIVES COMPUTER GENERATED DATA VIA 

 TELCO LINES THROUGH SUBSETS AND DRAWS 

 CONTOURS AND PRINTS SYMBOLS ON 

 PREPRINTED CHARTS 



Figure 9-6. — NEDN On-Line 

 (OLDS). 



209.346 

 Display System 



the function of the Aerographer's Mate to carry 

 out maintenance on this type equipment. 



NAVAL ENVIRONMENTAL 

 DISPLAY STATION (NEDS) 



The NEDS is a transmission, storage, dis- 

 play and printout unit. It consists of a mini 

 computer with storage capability, a television 

 monitor display, a high speed teletype printer 

 and a hard copy plotter. It will replace pre- 

 vious Automatic Data Processing equipment at 

 NEDN activities and will eventually replace 

 facsimile equipment at other Naval Weather 

 Service Activities. A NEDS system is being 

 developed for shipboard use. 



FLENUMWEACEN Monterey transmits data 

 from its computers to the storage unit at NEDS. 

 The operator then may display any of the data 

 at any time while it is in storage. Up to five 



162 



