ABSTRACT
Many times using words navigation system, GPS etc. “we are thinking” about geographical position and its accuracy, which in navigational system is a position error in chosen dimension and probability of user position [Januszewski, J. 2010]. Aviation navigation is the most complex kind of navigation because of third dimension existence [Specht, C. 2007]. That is why we should remember, in aviation two kinds of navigation system’s faults are important the horizontal position error and the vertical position error while in maritime navigation “we are focused” on horizontal position error only. Highly accurate navigation is the most important factor during a voyage and flight phase. At the very beginning of GPS work an oceanic en-route flight or air corridor flight were secured by the system mentioned above [Specht, C. 2007]. The knowledge of the GPS Navigation System accuracy became one of the elements which have a major meaning for the safety of practical navigation. Today's flight navigation is based in most aircrafts on Global Positioning System (GPS), which uses satellites signals to evaluate geographical coordinates, speed of flight etc. The GPS use is simply and accurate, that is why it's became widely used and more popular each day. One of the GPS device is Bendix / King GPS Navigation System KLN 90B which is a part of An-28 B1R navigational equipment and the another is GARMIN GPS 155XL a part of navy
helicopter Mi-14PL. This article presents researches of KLN 90B and GARMIN GPS 155XL accuracy during a flight plan route using Polish Navy MPA aircraft An-28B1R and Polish Navy helicopter Mi14PL. Also the influence of the accuracy for the safety of navigation during flight phase, initial approach, intermediate approach, non-precision approach, departure, category I precision approach the same success of maritime reconnaissance and search and rescue missions.
