ACCOUNTING OF CLOSEST POINT OF APPROACH (CPA) AND TIME OF CLOSEST POINT OF APPROACH (TCPA) ERRORS DURING PASSING OF VESSELS

Abstract

The main criteria for determining the safe divergence of ships are the distance and time of the shortest convergence. Therefore, the main task is to determine and account for errors that affect the values ​​of these parameters.

This article discusses the main safety parameters in case of divergence of vessels in a limited water area and in restricted visibility; a program has been drawn up for calculating the divergence of vessels taking into account the errors of the distance and the shortest approach time.

The main advantage of the program is that it not only calculates the parameters of a dangerous approach and thereby shortens the time, but also takes into account their errors, which is important when following vessels in a limited area. The master, in order to determine the basic safety criteria taking into account the errors, need only enter the vessel data, the targets and the errors of the instruments used.