While in the Hollywood movies people always succeed to miraculously enter heavily guarded objectives without being detected, in real life this should be impossi

While in the Hollywood movies people always succeed to miraculously enter heavily guarded objectives without being detected, in real life this should be impossible. With a well designed system of redundant sensors of multiple kinds, it should be impossible for anyone to come aboard such a ship without being instantly detected as a foe and without having their movements tracked with precision. The ship should have some self-defense system, but when that defense system is overwhelmed and it is impossible to prevent enemies to enter certain critical zones, self-destruction should be activated. When the internal communication between certain parts of the ship is lost, presumably due to damage inflicted by attackers, self-destruction may also need to be activated. This seems as one of the easiest parts to design of such a ship. Designing various sub-assemblies to be repairable using automatic means will be more challenging, especially in their mechanical design.