USS Hera
From Memory Alpha, the free Star Trek reference
The USS Hera was a Nebula class Federation starship that was in service during the 24th century.
In 2370, it was under the command of Captain Silva La Forge, with a crew of over three hundred that consisted mainly of Vulcans. During a routine courier run operating out of Deep Space 3, the Hera mysteriously disappeared.
A massive search mounted by the USS Excelsior and the USS Noble failed to discover any trace of the ship. The ship was believed lost and a memorial service was later held for the crew on Vulcan. (TNG: "Interface")
[edit] Technical data
The Hera used trionic initiators in the warp coils. (TNG: "Interface")
[edit] Background
The cause of the Hera's disappearance is never revealed on-screen; however, Chakotay speculated that Federation ships which vanish under similar mysterious circumstances may be victims of the effects of chaotic space. (VOY: "The Fight")
According to the Star Trek Encyclopedia, the Hera was a Nebula-class starship with the registry NCC-62006.
Like the Hera, the USS Intrepid and USS T'Kumbra also had predominantly Vulcan crews.
The USS Hera may have been named after the Greek goddess.