中文说明：
本程序目的是基于射线声学绘制深海声线图，适用水平分层介质，包括海面和海底反射，有详细思路和注释。
English Description：
The purpose of this program is to draw the deep-sea sound line map based on ray acoustics, which is suitable for horizontal layered media, including sea surface and seabed reflection.