new Voyager Class is equipped with a deck by deck holo grid, as
is the Prometheus Class, allowing the ship's EMH to travel throughout
the ship, no longer limiting him to the sickbay. The new class
was meany to carry the new Mark 2 EMH. However the crew of the
Voyager requested that their ship retain their original Mark 1,
due to his sentience. The doctor's mobile emitter is now only
required for away missions.