DD963 CLASS ADVISORY NO. 10-90 TOMAHAWK ARMORED BOX LAUNCHER (ABL) CONCERNS MSID/GENADMIN/NAVSEA PMS314// REF/A/RMG/COMDESRON TEN/122139ZAPR90/-/NOTAL// AMPN/REQUEST FOR SHIPALT AND ORDALT DEVELOPMENT STATUS// RMKS/ 1. THIS ADVISORY IS APPLICABLE TO DD963 CLASS TOMAHAWK ABL SHIPS. 2. THE PURPOSE OF THIS ADVISORY IS TO NOTIFY ALCON OF THE POTENTIAL HAZARD CONCERNING SIMULTANEOUS ENGAGEMENT OF ASROC OR MT51 GUN WHILE ABL IS IN RAISED POSITION. IT IS POSSIBLE FOR ASROC OR MT51 TO FIRE INTO A RAISED ABL. 3. THE DD963 CLASS ABL SHIPS ARE PROVIDED WITH INDICATOR LIGHTS ON ABL STATUS PANELS IN CIC AND ASROC LAUNCHER CONTROL ROOM TO ALERT OPERATORS THAT A PORT/STBD ABL IS UNLOCKED AND COULD BE ELEVATING/RAISED. IF THE PORT/STBD ABL INDICATOR LIGHT IS LIT, THE ASROC LAUNCHER MUST NOT BE FIRED. ABSENCE OF AN INDICATOR LIGHT SIGNIFIES THE ABL'S ARE STOWED. A PRESS-TEST BUTTON, ON THE ABL STATUS PANEL, IS PROVIDED TO TEST THE INDICATOR LIGHTS. 4. THE ASWCFO OPERATOR, ASROC LAUNCHER CAPTAIN AND GUN CONTROL OFFICER SHALL REMAIN AWARE OF THE ABL STATUS PANEL INDICATOR AND TAKE APPROPRIATE ACTION (DO NOT FIRE), TO PREVENT FIRING INTO A RAISED ABL. 5. PERSONNEL ON THE BRIDGE SHALL CLOSELY MONITOR ALL WEAPONS ENGAGEMENT ACTIVITY AND ALERT THE TAO OF ANY POTENTIAL CONFLICT BETWEEN ASROC, MT51, AND ABL FIRING. 6. THE POINTING AND FIRING CUTOUT CAMS FOR MT51 AND ASROC ARE SET FOR ABL IN THE STOWED POSITION. 7. NAVSEA WILL INITIATE ACTION TO INSTALL AN ADDITIONAL ABL STATUS PANEL AT THE MK 86 CONTROL OFFICER'S CONSOLE, TO ALERT THE OPERATOR THAT A PORT/STBD ABL IS UNLOCKED AND MT51 SHOULD NOT BE FIRED. ADDITIONALLY, AS AN ADDED SAFETY FEATURE, NAVSEA WILL INVESTIGATE INSTALLATION OF AN ADDITIONAL TV MONITOR AT THE LAUNCHER CAPTAINS POSITION AND THE MK 86 CONTROL OFFICERS CONSOLE TO PROVIDE A VIEW OF BOTH ABL'S. 8. NAVSEA HAS DEVELOPED ALL PRELIMINARY DATA RELATING TO SHIPALT/ORDALTS REQUIRED TO PROVIDE THE FIRING CIRCUIT INTERLOCKS WHICH WILL PRECLUDE ANY SAFETY HAZARD DURING SIMULTANEOUS ENGAGEMENTS OF THE WEAPON SYSTEM AND IS AT PRESENT ATTEMPTING TO OBTAIN FUNDING FOR FINAL DEVELOPMENT AND INSTALLATION. 9. TYCOMS ARE REQUESTED TO REVISE THE FIRING DOCTRINE FOR THESE SHIPS TO REFLECT THIS CLASS ADVISORY. 10. THIS CLASS ADVISORY ANSWERS REF A.// 242104Z MAY 90 COMNAVSEASYSCOM