The Alpha-class heavy transport, a starship measuring 400 meters, was a vessel produced by Corellia StarDrive prior to 4000 BBY and served the purpose of both cargo and passenger transport.
A specific example of this transport class, known as the Sun Runner, functioned as a colony ship circa 4000 BBY when Margrave Octan utilized it to move his family, along with 867 colonists, from the Darpa Sector to Nallastia, a moon of Fondor situated in the Tapani sector.