USS Emden
The USS Emden (NCC-1856) was a 23rd century Federation  starship operated by Starfleet.

In 2293, the Emden was assigned a Neutral Zone patrol mission. The ship was named on a Starship Mission Assignments chart on the  bridge.

Later that year, in the "Operation Retrieve" command briefing, the Emden was depicted as being in the theater of operations. Furthermore, it was named as one of the ships on station in Sectors 21166-8. ()

Appendices

Background information 
On the plans, the Emden was represented by the silhouette of a refit  starship.

An unseen element from the Operation Retrieve charts included a list of starships, their registries and their commanders. According to this list, the Emden was commanded by C. Thomas, named after that film's photographic effects editor Robert C. Thomas. Emdens last reported location was in Sector 21803. The Emden'' might have been named after one of several German  of the same name, which were, in turn, named after the city of .

Apocrypha 
The Decipher roleplaying game supplements stated that this vessel may have been a  starship.

External link 
 

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Emden