Models of test conditions for coastal facilities of maritime safety systems in the medium and very high frequency ranges

The paper studies the issue of creating models for testing coastal objects of navigation safety systems in the medium and very high frequency ranges in the absence of the possibility of directly ensuring the worst conditions for testing and parameters of ship equipment while ensuring that such tests comply with the definition of the term "verification test in site". The test object, test equipment and test conditions and their distribution on the ship side and on the shore station side are determined. The criteria for confirming the boundaries of working zones in the form of field strength on the ship side and in the form of electromotive force on the shore station side are determined. The corresponding mathematical models for taking into account the worst values of test conditions caused by the influence of external factors and the worst values of permissible parameters of ship equipment for the main technical means, the use of which ensures that the tests comply with the definition of the term "verification test in site", are proposed and analyzed. The need was noted for introducing requirements into the relevant regulatory documents regarding the percentage of required availability of technical means in the very high frequency range and the admissibility of tests that do not fully correspond to the definition of the term "verification test in site" in the event of the absence of organizational or technical capability to send a test vessel to the boundaries of working zones.

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