
Tech 1 amphibious construction, repair, capture and reclamation unit.
Time is 260 build points divided by build power. Drain is mass and energy per second while it is building, so more build power finishes sooner and costs the same total, but pulls harder on the economy.
Aeon engineers can sacrifice themselves into something under construction, turning the engineer into progress on the build. Nobody else can do it, and it turns a stranded engineer into a finished building rather than a loss.