Dereto needs help from Sterus and Dirn to update his shields.
Stage 1:
Sterus is studying several asteroids on the edge of Inore. Trade with Sterus and bring power schematics back to Dereto in Inore (2,1,0)
Stage 2:
Trade power system schematics to Dirn in Kattar (1,-1,0) and bring shield schematics to Dereto.