supply interruption warning unit

Warning text that appears when the battery voltage falls below warning threshold

warning system control unit

warning electronic unit

caution and advisory panel / emergency warning signal unit

emergency warning signal unit / caution and advisory panel

supply unit

unit of supply

power supply unit

battery coolant unit / battery-coolant unit (BCU)

gear reduction unit / gear-reduction unit

position and navigation unit / position navigation unit (PNU)

pinch (a unit) out of a large unit

advance warning

advance-warning satellite

air defense early warning

airborne early warning (AEW)

airborne early warning aircraft

airborne warning and control aircraft

Airborne Warning and Control System (AWACS)

distant early warning line

early warning (air defense)

early warning (EW)

early warning ground-based radar (EW GBR)

early warning radar station

early warning sharing (system) (EWS)

early warning system (EWS)

early warning system (EWS) operator

fire a warning shot

gas alarm / warning

missile attack warning

missile early-warning system

missile warning