Code Black was a term used by Han Solo and Chewbacca that meant to drop everything immediately and run.
A Code Black was a transmission made by the Obsidian Order in the mirror universe. In 2377, the Obsidian Order made a Code Black transmission to Intendant Kira Nerys (who was actually Iliana Ghemor posing as the deceased Intendant) when the IKS Negh'Var arrived at a rendezvous with an Alliance battle fleet at Regulon. (DS9 novel: The Soul Key) Given Ghemor's familiarity, the primary universe Obsidian Order might have used Code Black transmissions as well.
Code Black was a term used by Han Solo and Chewbacca that meant to drop everything immediately and run.
A Code Black was a transmission made by the Obsidian Order in the mirror universe. In 2377, the Obsidian Order made a Code Black transmission to Intendant Kira Nerys (who was actually Iliana Ghemor posing as the deceased Intendant) when the IKS Negh'Var arrived at a rendezvous with an Alliance battle fleet at Regulon. (DS9 novel: The Soul Key) Given Ghemor's familiarity, the primary universe Obsidian Order might have used Code Black transmissions as well.