Following trials with an unspecified ship the Sea Of Tranquillity 43D class of frigates have been cleared to now travel at 1025c (dash) / 870c (cruise). The engine on the ships was more powerful than those on the 43C but up until now speed has been restricted until the DDS were sure the superstructure was stong enough for the higher stresses.
The DDS plan to re-engine the fleet with a further evolution of the Meson TL-04 engine in the next couple of years though the type is said to be "third on the list" behind the Panther and Quasar for fitting with worm-drive.
