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.//
DDG-51