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** Description:** It has been shown that failures in the operation of the radio navigation complexes of water transport vehicles while traveling
along the route may lead to significant additional costs due to deviations from the identified route. It is substantiated that the
control of the technical state of the radio navigation complexes of water transport means is one of the ways of maintaining them
in good condition and significantly influences the efficiency of their tasks. This is due to the fact that the overwhelming majority
of these samples of radio navigation complexes of water transport vehicles operate in an aggressive environment. It is substantiated
that optimal characteristics of the system of control of the technical condition of radio navigation complexes of water transport
facilities should be calculated provided that the maximum (minimum) value of the relevant criterion is ensured. Consequently,
the formulation and solution of the problem of calculating the optimal characteristics of the above control system involves
the definition of specific synthesis criteria. The purpose of this work is to develop a method for calculating the sensitivity
criterion for the technical state of the radio navigation complexes of water transport vehicles. The task of determining the optimal
method for controlling the technical state of the radio navigation complexes of water transport means is formulated. The
optimal method is that, at a given a priori area, the “deviation” of the control parameters, the set level of interference, the required
time of control allows to minimize the a posteriori region of “deviation” of the parameters of the system (or the functions
of these parameters). The method of calculating the sensitivity criterion for the technical state of the radio navigation complexes
of water transport facilities is developed. This method is proposed for use in substantiating the optimal characteristics of the
control system of the technical state of the radio navigation complexes of water transport vehicles during operation. Subsequent
studies are proposed to justify and calculate other criteria of optimality and compare them.

**
Keywords:
** radio navigation complex, means of water transport, sensitivity criterion, control parameters

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