雷达素有舰艇“千里眼”之称,在日常海上训练、导航、判别目标、担负战斗、执勤观测等任务中发挥着重要的作用。若及时发现目标、正确判别和连续跟踪目标,必须对本艇经常活动的海区固定目标名称、相对位置、各种船艇的活动规律、水文气象、潮汐等情况了如指掌,在脑海中有一张“活海图”。因此,熟悉海区是航海人员重要的基础训练 Radar ships known as “clairvoyance”, said, in the daily training, navigation, determine the target, responsible for combat, duty observation and other tasks play an important role. If the target is detected in time and the target is correctly identified and continuously tracked, the name and relative position of the fixed target in the sea area where the vessel is regularly operated, the rules of the activities of various boats, hydrological weather, tides and so on must be well known. Chart ". Therefore, being familiar with the sea area is an important basic training for sailors