短波在海面传播特性，传播距离在4000km之内-Short wave propagation characteristics in the sea, the propagation distance within 4000km

受海风影响舰船存在六个运动自由度：纵摇、摇首、横摇、升沉、横荡和纵荡，甲板运动模型使用正弦波叠加的方式模拟诺克斯级军舰甲板运动，程序为其运动仿真程序(By the influence of ship sea breeze has six degrees of freedom: pitching, yaw, roll, heave, sway and heave motions, Knox class ships deck motion simulation deck motion model u