参考:http://en.citizendium.org/wiki/Anti-shipping_missile The U.S. AGM-84 Harpoon(鱼叉导弹), however, has two modes available: bearing-only launch (BOL), where the radar seeker guides the entire flight(发射后不管,雷达全程开机自主制导), and an initial inertial mode(惯性制导). The inertial mode can be programmed to fly a "zigzag" or "dogleg" course, so several Harpoons can be sent at a target, and complicate its defense problem by simultaneous attacks from different directions.