“Size isn't everything, it is like painting an even bigger mark on your hull...”
- - A Dweller Admiral towards an Astin Lieutenant
A Rôysôv was the strongest ship ever build by the Dwellers. Ranging up to 3500km it was a ship of immense size. Costs of the ship are speculated to be around 175.000.000.000.000.000£. therefore they had only build 5 of them. It was builded with Compressed Aggregated Carbon Nanorods(also known as Nanodiamond). The ship was not big compared to the ships of other empire's, but the Dwellers believed that quality would surely beat quantity. Therefore they made their weapons, defences and engines far better upgraded(compared to ships from the same size).
The Mug'ak was scavenged after the Mutation.
The Drytgok, as the first of its kind it was simply too old to be kept in their militairy, therefore it was scavenged.
The Nubrox's fate is unknown, wether it was captured, destroyed, scavenged or hidden is unknown and no data exists of its whereabouts.
The Hugat was destroyed during the 5th Dweller war when the commanding admiral sacrificed himself to stop an asteroid being flung towards a colony by the enemy.
The Xiongu got sucked into a black hole after their engines had died.