Nanobots

Nanobots are nanometer-scale artificial organisms programmed to deploy emergency in flight repairs to a ship's hull systems. Nanobots don't repair damage suffered by external systems as weapons, thrusters, mine and counter measure droppers etc. Even though the ship's hull is repaired for combat effects after the nanobots are activated in flight, any structural damage won't be repaired until the ship is subject to regular repairs upon landing on a base.

Ships have a limited number of nanobots they can carry.