Auto-stabilizer
Auto-stabilizers were components used aboard  starships, for the purpose of stabilizing the warp field. The ship's computer automatically ran diagnostics on the auto-stabilizers.

In 2152, the crew of  noticed that the ship's warp field was out of alignment. At first they thought it was a malfunction in the ship's auto-stabilizers, but upon realizing that they were functioning properly, they discovered that the problem was being caused by a number of cloaked s which were surrounding Enterprise. ()
Warp