Fleet of the Damned (Sten #4). Allan Cole

the end of the day the students were ordered to dock their ships. The maneuver was very simple: lift the ship on antigrav, reverse the Yukawa drive, and move the transport into its equally monstrous hangar. There were more than adequate rear-vision screens, and a robot followed me sat on tracks to mark the center of the hangar.

      But somehow Sten lost his bearings—and the Empire lost a hangar.

      Very slowly and majestically the transport ground into one hangar wall. Equally majestically, the hangar roof crumpled on top of the ship.

      There was no damage to the heavily armored transport. But Sten had to sit for six hours while they cleared the rubble off the ship, listening to a long dissertation from the instructor pilot about his flying abilities. And his fellow trainees made sure it was a very long time before Sten was allowed to forget.