The USS Balmung (NCC-28964) was a Federation starship of undisclosed class in service to Starfleet in the 24th century. It was named after Balmung, the mythical sword from Earth's Norse/german legends.
While on patrol near the Neutral Zone, the Balmung was resupplied by the cargo ship USS Mughi. The operation was undertaken by several workbees and at least two shuttlecraft, one of which was the Balmung's shuttle Weyland. (ST references: Ships of the Line 2012, Ships of the Line)
The Balmung was designed by artist Dan Uyeno as a chronologically intermediate starship between the Excelsior-class and the Ambassador-class. Along with the Mughi, it was featured in the 2012 Ships of the Line calendar in the image Reprovisioning at Sea for February.