CG-47

                     CG 47 CLASS ADVISORY NR 13-93                              

                                                                                

     WEAPON CONTROL SYSTEM - CLOSE INWEAPON 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 BASELINE 1 THROUGH 4 SHIPS WITH CIWS BLOCK 0 AND BLOCK              

 1 BASELINE 0 CIWS DIGITAL REMOTE CONTROL PANEL (RCP) (CG 49 AND                

 59 THROUGH 67).                                                                

                                                                                

 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 0015 (BLOCK 0 DASH 15) OR USN 1005 (BLOCK 1 BASELINE              

                                                                                

 0 DASH 5) COMPUTER PROGRAM (SCHEDULED FOR RELEASE IN NOV 93 AND                

 APR 94 RESPECTIVELY).  THESE PROGRAMS INCORPORATE LOGIC WHICH                  

 CAUSES THE RCP TO INITIATE VALID COMMUNICATIONS WHEN THE CIWS                  

 COMPUTER IS RELOADED.  AEGIS INTEGRATION IS SCHEDULED AS FOLLOWS:              

                                                                                

         B/L 1.4.1  (CG 49)             -  JUL 94                               

         B/L 3.2.6  (CG 59 AND 60)      -  FEB 94                               

         B/L 3.2.6  (CG 61 THROUGH 64)  -  AUG 94                               

         B/L 4.2.7  (CG 65 THROUGH 67   -  AUG 94                               

                                                                                

      D.  CIWS USN 0015 APPLIES TO CG 59 AND CG 60.  CIWS USN 1005              

 APPLIES TO CG 49 AND CG 61-67.  THIS ADVISORY DOES NOT APPLY TO                

 CG 47, 50, 51, 53-56, 58, AND 68-73 WHICH HAVE THE COMPUTER                    

 CORRECTION VIA USN 1102 AND 1201.  CG 48 HAS ANALOG INTERFACE.                 

 CG 52 AND 57 DO NOT HAVE INTEGRATED WCS PROGRAM.                               

                                                                                

 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 AFFECTED SHIPS                

 BE TASKED TO ADHERE TO THE PROVISIONS OF PARA 3 ABOVE.                         

                                                                                

 5.  FOR NWSCDD (CODE N21, N25) - SCHEDULE CIWS USN 0015/1005                   

 COMPUTER PROGRAM INSTALLATIONS AS SOON AS POSSIBLE AND NOTIFY                  

 ORIG BY MSG WHEN CIWS USN 0015/1005 PROGRAM HAS BEEN INSTALLED IN              

 AFFECTED SHIPS.                                                                

                                                                                

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

 PROCEDURES OR TECHNICAL DOCUMENTATION.  IT WILL BE CANCELED WHEN               

 THE CIWS USN 0015/1005 COMPUTER PROGRAM HAS BEEN INSTALLED IN                  

 AFFECTED SHIPS.                                                                

                                                                                

 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.//