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In order to search for crashed planes, we discuss that the resistance changes with velocity of the airplane. Then we draw the settlement trajectory without effects of ocean currents by using Runge-Kutta method. We also do gray-scale processing to seabed topography map around the drowning point to get a group of seabed terrain data, so that we can find the location of the airplane on the seabed.

Runge-Kutta method, finding the drowning point when search for crashed planes on the seabed