Traditionally the Dinos have not undertaken major upgrades of the Dinomark XT fleet. Although ships do receive in-service upgrades major rebuilding projects like the DDS ILUs are unknown. XTs gradually become less up-to-date and get relegated to second-line roles, then support roles, then are sold on to the civilian reserve fleet (and eventually when they are too ancient leave even that).
Consul El Diablo has signalled a change in policy. 80 older XTs will be upgraded to a new Dinomark XT/122M standard from next year. The Mark 122M will be similar to the current new-build Mark 120 and will have W2B worm drive, the latest Solarburst revision engine and full weapon and sensor updates. El Diablo said this would be far more cost-effective than simply replacing with new build (which will continue, likely at a slower rate) and would increase the number of worm-drive equipped ships in the fleet. The Consul said he wants the whole Dinomark fleet to be worm-drive equipped by 2118.
