1. A DISPOSABLE BOMB ARMING UNIT COMPRISING: (A) A CASING HAVING A CAVITY IN ONE END AND A CIRCULAR CHANNEL IN THE OTHER END, (B) AN ELECTRICALLY INSULATED BASE PLATE CLOSING SAID CAVITY, (C) A FIRST ELECTRICAL CONDUCTOR ATTACHED TO SAID BASE PLATE, (D) A SECOND ELECTRICAL CONDUCTOR SLIDABLY MOUNTED WITHIN SAID CAVITY, (E) A FLEXIBLE ARMING CABLE HAVING ONE END CONNECTED TO SAID SECOND ELECTRICAL CONDUCTOR AND HAVING A PORTION OF ITS LENGTH STOWABLE IN SAID CIRCULAR CHANNEL, AND (F) MEANS ENGAGING SAID FLEXIBLE ARMING CABLE FOR SEPARATING SAID FIRST ELECTRICAL CONDUCTOR FROM SAID SECOND ELECTRICAL CONDUCTOR WHEN SAID FLEXIBLE ARMING CABLE IS STOWED IN SAID CIRCULAR CHANNEL.