It’s the buzzing sound that lets you know they’re coming. The repulsors underneath their vehicles are loud, but the frequency is outside their hearing range so they don’t really take it into consideration. They must wonder why we’re always ready for them; if their technological advantage weren’t so great we would have won long ago. As it is we’re steadily winning a war of attrition, one for which there won’t be any reinforcements for the other side.
They still have their ship, but the officers say it’s dead in space, out of fuel, abandoned and useless. I hope they’re right.