In 1986, Bombardier entered the aircraft manufacturing business when it acquired Canadair, a manufacturer based in Canada. In 1989, it also acquired Short Brothers, a Northern Ireland manufacturer of military and civil aircraft, and defense systems. In 1990, Bombardier acquired Learjet Corporation, manufacturer of the Learjet business jet. Bombardier currently designs and manufactures the CRJ series of commercial airliners, smaller aircraft of around 50 seats. They also have a line of business aircraft, including the Learjet. The Bombardier Aerospace Bombardier 415 is an amphibious aircraft used for firefighting, search and rescue, surveillance, and for other purposes.