What is "sustainers"

Usage examples of "sustainers".

When that much has been achieved, many of the warships anchored here, and at Kuat and Bothawui—all of which have been retrofitted with hyper-wave inertial momentum sustainers produced by theFondor shipyards—will launch, penetrating the interdiction field at its farthest extreme, and advance through a series of micro jumps to engage the enemy.

Scrivener and Captain Smith were now in fact the sustainers of the colony.