Emergency Command and Conn Hologram

The Emergency Command and Conn Hologram (ECCH) is an updated version of the Emergency Command Hologram (ECH), which is an extension of the Emergency Medical Hologram. It is part of the Emergency Holographic Complement of the Fleet Carrier classes and the Heavy Battleship classes of Starfleet.

History
The ECH was first imagined in one of the USS Voyager (NCC-74656)'s Emergency Medical Hologram's fantasies. The program was eventually implemented by Captain Kathryn Janeway on Voyager.

The extension was first envisioned by The Doctor after he had added daydreaming subroutines to his program in 2376. His initial request to Captain Janeway for the subroutine to be added to his program was denied, but after The Doctor demonstrated his abilities in practice, Janeway reconsidered and ordered research into the development of the ECH to begin as soon as possible.

Later, Starfleet expanded the concept to include not only command subroutines into the program, but also conn subroutines, thus the new term of "Emergency Command and Conn Hologram".

Capabilities
Essentially, the Mark II ECCH was a "backup Commanding Officer" and "backup Conn Officer", intended to take control of the ship in the event of the current command crew being incapacitated for some reason. The ECCH possesses over 2 million command and conn subroutines from the command and flight control databases of all the leading Commanding Officers and Conn Officers in Starfleet, and could incorporate them into its plans for controlling the ship.