The DY-245 was a type of Earth starship that was utilized during the 22nd century. (TNG: "Up the Long Ladder")
Ships commissioned
Background
The name of this ship type appeared on an Okudagram that appeared on Picard's desk monitor, and was not verbally referenced on screen. A legible version of the Okudagram would appear in the reference book, Star Trek: The Next Generation - The Continuing Mission.