DDG-51

                DDG 51 CLASS ADVISORY NR 07-93                                  

                                                                                

   WEAPON CONTROL SYSTEM - CLOSE IN WEAPON SYSTEM (WCS-CIWS)                    

                     DIGITAL INTERFACE                                          

                                                                                

 RMKS/1.  THE PURPOSE OF THIS ADVISORY IS TO PROVIDE INFORMATION                

 CONCERNING A WCS/CIWS DIGITAL INTERFACE ISSUE.  THIS ADVISORY                  

 APPLIES TO DDG 51 - 53.  DDG 54 AND FOLLOW WILL RECEIVE A CIWS                 

 COMPUTER PROGRAM UPGRADE DURING CONSTRUCTION THAT RESOLVES THE                 

 ISSUE DESCRIBED BELOW.                                                         

                                                                                

 2.  BACKGROUND.  TESTING OF THE WCS/CIWS INTERFACE HAS REVEALED A              

 PROBLEM ASSOCIATED WITH A CIWS WEAPON CONTROL GROUP (WCG)                      

 COMPUTER PROGRAM RELOAD, PERFORMED UNDER ONE OF THE FOLLOWING                  

 CONDITIONS:                                                                    

                                                                                

      A.  IF WCS IS ON-LINE AND EXECUTING AND THE CIWS COMPUTER                 

 PROGRAM IS RELOADED WITH THE CIWS REMOTE CONTROL PANEL (RCP) SET               

 FOR REMOTE AEGIS DESIGNATIONS (AUTO DESIG ENABLE LIT WHITE AND                 

 CIWS IN RCP CONTROL), CIWS WILL NOT COMMUNICATE WITH WCS.                      

                                                                                

      B.  IF WCS IS BROUGHT ON-LINE FOLLOWING CIWS PROGRAM RELOAD               

 WITH THE CIWS RCP SET FOR REMOTE AEGIS DESIGNATIONS, CIWS WILL                 

 REPORT "STANDBY" MODE TO WCS EVEN THOUGH THE ACTUAL MODE IS "AIR               

 READY" OR HIGHER.                                                              

                                                                                

      C.  IN BOTH OF THE ABOVE SITUATIONS, THE WCS COMPUTER WILL HOLD           

 A CIWS STATUS OF NON-TACTICAL AND UNAVAILABLE.  IN THIS CASE, WCS              

 CANNOT DESIGNATE A TARGET TO CIWS UNLESS BATTLESHORT IS ENABLED                

 AT THE COMPUTER PROGRAM INTERFACE SUPERVISION (CPIS) SUBMODE.                  

 THE RCP WILL SHOW CIWS ALIGNED TO ACCEPT WCS DESIGNATIONS, BUT                 

 THE MSS AND AAWC CROS WILL INDICATE CIWS IS NOT AVAILABLE FOR                  

 DESIGNATION.  THIS PROBLEM WILL BE CORRECTED BY INSTALLATION OF                

 THE CIWS USN 1005 (BLOCK 1 BASELINE 0 DASH 5) COMPUTER PROGRAM                 

 SCHEDULED FOR RELEASE IN APR 94.  THIS PROGRAM INCORPORATES LOGIC              

 WHICH CAUSES THE RCP TO INITIATE VALID COMMUNICATIONS WHEN THE                 

 CIWS COMPUTER IS RELOADED.  AEGIS INTEGRATION IN B/L 4.2.7 (DDG                

 51 AND 52) AND B/L 5.0 (DDG 53) IS SCHEDULED FOR AUG AND OCT 94                

 RESPECTIVELY.                                                                  

                                                                                

 3.  ACTION. PRIOR TO RECEIPT OF THE NEW CIWS COMPUTER PROGRAM,                 

 PERFORM THE FOLLOWING:                                                         

                                                                                

      A.  IF THE CIWS COMPUTER IS RELOADED WHILE CIWS IS SET FOR                

 AUTO DESIGNATION, PLACE THE RCP "RCP/LCP" KEY SWITCH IN THE "LCP"              

 POSITION.  FOLLOWING THE COMPLETION OF THE COMPUTER PROGRAM                    

 RELOAD, WHEN THE SYSTEM IS IN "AIR READY" MODE, PLACE THE KEY IN               

 THE "RCP" POSITION.  THIS ESTABLISHES WCS/CIWS INTERFACE                       

 COMMUNICATIONS.                                                                

                                                                                

      B.  IF THE WCS COMPUTER IS BROUGHT ON-LINE FOLLOWING A CIWS               

 COMPUTER PROGRAM RELOAD, PLACE THE RCP "RCP/LCP" KEY SWITCH IN                 

 THE "LCP" POSITION.  WHEN WCS IS ON-LINE AND EXECUTING, PLACE THE              

 KEY IN THE "RCP" POSITION.  THIS ESTABLISHES WCS/CIWS INTERFACE                

 COMMUNICATIONS.                                                                

                                                                                

 4.  FOR COMNAVSURFLANT/COMNAVSURFPAC - RECOMMEND TASK DDG 51 - 53              

 TO ADHERE TO THE PROVISIONS OF PARA 3 ABOVE.                                   

                                                                                

 5.  FOR NWSCDD (CODE N21, N25) - SCHEDULE CIWS USN 1005 COMPUTER               

 PROGRAM INSTALLATION AS SOON AS POSSIBLE AND NOTIFY ORIG BY MSG                

 WHEN CIWS USN 1005 PROGRAM HAS BEEN INSTALLED IN DDG 51 - 53.                  

                                                                                

 6.  THIS ADVISORY HAS NO IMPACT ON EOSS, CSOSS, PMS, FMP, TEST                 

 PROCEDURES OR TECHNICAL DOCUMENTATION.  IT WILL BE CANCELED WHEN               

 THE CIWS USN 1005 COMPUTER PROGRAM HAS BEEN INSTALLED IN DDG 51-53.            

                                                                                

 7.  POINT OF CONTACT IS MR. N. S. SMITHSON, PMS400F511, DSN:                   

 332-5981 (EXT 133) OR COMM (703) 602-5981.  TECHNICAL POC IS CDR               

 J. WILSON, PMS400B30A, DSN: 332-7090 (EXT 222) OR COMMERCIAL (703)             

 602-7090.//