1-105 Table 1-31.—Shipboard Alarm and Warning System CIRCUIT SYSTEM BZ Brig cell door alarm and lock operating BW Catapult Bridle Arresterman safety Ind. CX Bacteriological Lab. & Pharmacy Comb. Refer Failure DL Secure communications space door position alarm DW Wrong direction alarm EA Reactor compartment or fireroom emergency alarm 1EC Lubricating oil low pressure alarm-propulsion machinery 2EC Lubricating oil low pressure alarm-auxiliary machinery 1ED Generator high temperature alarm 2ED Oxygen-nitrogen generator plant low temperature alarm EF Generator bearing high temperature alarm EG Propeller  pitch control, hydraulic oil system low pressure alarm EH Gas turbine exhaust high temperature alarm EJ Feed pressure alarm 1EK Pneumatic control air pressure alarm 3EK Catapult steam cutoff and alarm EL Radar cooling lines temperature and flow alarm EP Gas turbine lubricating oil high temperature alarm 1EQ Desuperheater high temperature alarm 2EQ Catapult steam trough high temperature alarm 3ES Reactor fill alarm ET Boiler temperature alarm EV Toxic vapor detector alarm 1EW Propulsion engines circulating water high temperature 2EW Auxiliary machinery circulating water high temperature EZ Condenser vacuum alarm F High temperature alarm 4F Combustion gas and smoke detector 9F High temperature alarm system-ASROC launcher 11F FBM storage area temperature and  humidity alarm 12F Gyro ovens temperature and power failure alarm FD Flooding alarm FH Sprinkling alarm FR Carbon dioxide release alarm FS Flight Deck Readylight Signal system FZ Security alarm (CLASSIFIED) 4FZ Torpedeo alarm (CLASSIFIED) HF Air flow indicator and alarm LB Steering Emergency Signal system LS Submersible steering gear alarm MG Gas turbine overspeed alarm NE Nuclear  facilities air particle detector alarm NH Navigation Horn Operating System