Stabilised Automatic Bomb Sight

The Stabilised Automatic Bomb Sight (SABS) was a Royal Air Force bombsight used in small numbers during World War II. The system worked along similar tachometric principles as the more famous Norden bombsight, but was somewhat simpler, lacking the Norden's autopilot feature. Development had begun before the war as the Automatic Bomb Sight, but early bomber operations proved that systems without stabilisation of the bombsight crosshairs were extremely difficult to use under operational conditions.

Source: Wikipedia — Stabilised Automatic Bomb Sight (CC BY-SA 4.0)