AGM-84h anti-ship missile (A/R/UGM-84, Harpoon) Harpoon/whaling harpoon) is an anti-ship missile developed by McDonnell Douglas of the United States. It was equipped with the army in 1979. It is also the most important anti-ship weapon in the United States Navy and Air Force. In addition, the U.S. Navy has developed a SLAM (Stand off Land Attack Missile) with the Harpoon missile.