Alert status one, also known as defense condition one, was a Klingon alert signal announced during the preparation for battle. In 2373, first officer Worf issued an alert status one on board the IKS Rotarran after detecting a Jem'Hadar patrol ship running active polaron scans of a sector outside of the Cardassian border. (DS9: "Soldiers of the Empire") In 2375, General Martok called for the IKS Ch'Tang to set defense condition one prior to the ship's arrival and attack on the Dominion base on Trelka V. (DS9: "Once More Unto the Breach")