Precision of ship steering along a waterway bend with the use of ARPA information

The usage of stationary object tracking information while steering a ship along a marked waterway relies on the constant estimation of the object passing distance made by the navigator. This information is available both in the alphanumeric form (target data) and in the graphic form (relative vectors). While making decisions, the navigator has to take into consideration the limitations of ARPA devices, particularly delays in transferring information about tracked objects occurring when ships are making manoeuvres. The results of the experiment performed in the radar-navigation NMS-90 simulator, which has been conducted in order to establish the usability of the stationary object tracking information in the process of ship steering along a marked waterway are described in this article.