Master systems display

From Memory Alpha, the free Star Trek reference

On Federation starships, the master systems display (abbreviated MSD), also known as the master situation monitor, or master situational display, is a large, wall-mounted computer display in engineering and on the bridge. The display usually featured a large cutaway diagram of the vessel, and was used to provide a detailed overview of the ship's status.

The USS Enterprise-D had its master systems display in engineering, while the starships USS Voyager, USS Defiant, USS Hathaway, USS Equinox USS Enterprise-B and USS Enterprise-E all featured their displays on the bridge. MSDs for Constitution-class starships could be loaded up from the computer.

Constellation-class MSD	Dauntless-class MSD	Defiant-class MSD (inaccurate version)	Galaxy-class MSD
Intrepid-class MSD	Miranda-class MSD	Nova-class MSD	Oberth-class MSD
Raven type MSD	Sovereign-class MSD	Yellowstone-class MSD

The first MSD was created for the sets of the Enterprise-D. According to the Star Trek Encyclopedia, it included a number of in-jokes, including "the official USS Enterprise duck, the ship's mouse, a Porsche, a DC-3 airplane, the Nomad space probe, and the hamster on a treadmill that was alleged to be the true source of power for the ship's warp engines." The only major series starship that hasn't had a large MSD of some sort is the Enterprise NX-01.

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For larger images of the present cutaways and more cutaways visit the following pages: [1] [2] [3] For a website with a complete catalog of all starships encountered in the series visit [4]