The Isometric ILU is the most expensive upgrade programme in the history of the DDS (though largely because there are 25 Isometric 41As to upgrade). The Terran Sea ILU which will follow in a couple of years is likely to be even more expensive though!
The DDS have begun to survey senior DDS officers, especially the captains of Terran Sea frigates, as to the ILU. It is definitely to have TPM-2 and Z6 as the weapon upgrades with MRM support also likely but other improvements have yet to be decided upon.
