The DDS has just completed a structural survey of its fleet of Starsystem 91X training ships. Although the ships had an end of service date officially of 2120 the DDS has to begin preparing for their replacement now. Following a survey DDS Engineering say at current usage patterns the fleet should be able to make 2123-4 without much problem. The DDS have thus pushed back their withdrawal date to 2122-4.
It is thought the DDS will replace the Starsystems with Isometric 41A MCS though as some have pointed out, the youngest Starsystem (SS Proxima Centauri) is only 14 months older than the oldest Isometric SS Cambrian. DDS Engineering point out however that the Isometrics were built for a much longer service life than the Starsystems and should have no problem reaching the early to mid 2130s.