This page contains information regarding Star Trek: Discovery, and thus may contain spoilers.
The Courage-class was a type of Federation starship operated by Starfleet during the 31st and the 32nd centuries. Its design featured a vertically-oriented diamond-shaped primary hull, with an engineering hull protruding aft from the middle.
In 3069, this class saw the loss of several ships to The Burn. Ships with active warp cores were destroyed when their dilithium became inert, resulting in antimatter explosions. (DIS: "People of Earth")
In 3189, the fleet at Federation Headquarters included ships of this class. The collective energy of this fleet sustained a distortion field that concealed the headquarters' location. (DIS: "Die Trying", "The Sanctuary", "There Is A Tide...")
The name of this class comes from concept art released by CBS on Twitter.  The artwork featured a "USS Jubayr (NCC-325068)", though that ship name has not been used on screen. This class was also featured in promotional artwork on social media following "Die Trying".