The Stabilized 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. The system throughout its history was produced in small numbers, all built by hand. Ultimately the 617 was the only squadron to use the SABS operationally, using it with the Tallboy and the larger 22,000 pounds (10,000 kg) Grand Slam bombs. Some Avro Lincolns also were also fitted with SABS, but saw no operational use.