The Emergency Conn Hologram or ECH was a sophisticated holographic tactical officer serving aboard Starfleet, Klingon Defense Force and Romulan Republican Force ships in the early 25th century. (STO mission: "Crystalline Catastrophe")


Two versions of the Emergency Conn Hologram were released in 2410, one by Starfleet and the KDF each. The RFF had access to these officers as well through their allies. The Starfleet version used a male Human template and was assigned the rank of senior chief specialist. The KDF emergency conn officer was ranked lieutenant and based on a male Klingon. Irrespective of rank, uniform and physiognomy, both officers were programmed to be efficient, resolved, stubbon and equipped with eidetic memory. (STO mission: "Crystalline Catastrophe")

Like all holograms in military service in the 25th century, the Emergency Conn Hologram was considered a sentient lifeform and therefore preferably designated a Photonic. (STO mission: "Crystalline Catastrophe")


The Emergency Conn Hologram was introduced in early 2410 when the Allied forces faced off against the Crystalline Entity once again. (STO mission: "Crystalline Catastrophe")