Space Princess was a pleasure crusier that operated from Zerok to Earth. It was apparently carrying passengers on a tour of various galactic sights but this was a cover for direct 12-day run to Earth carrying gold for the Federation. The itinerary was pre-recorded and the passengers drugged to make them believe what they were seeing. The gold was listed as a cargo of fruit.
Scorpio made its first docking with the ship after Avon was contacted by Keiller. The ship had just been refitted at an unspecified location and was flying on automatic with only person aboard being Keiller.
On Zerok to Earth voyages, the ship flew under Captain Kennedy. Keiller also noted that the usual doctor was a "drunken halfwit", but on the voyage intercepted by Avon the decidedly more competent Dr Slaten filled this post. Keiller himself travelled as the ship's purser, though he was in fact in charge of the security team protecting the gold. Keiller mentioned only three guards and two others disguised as passengers, but at least five uniformed guards were killed during the heist.
Soolin noted that the ship was unarmoured and Avon that it was unarmed, neither of which is surprising. Avon and Soolin board the ship via the conveyor tunnel from the processor on Zerok. (TV: Gold)