Guarantee of the ship safety is the primary task posed for modern navigation systems. This concerns monitoring the proper ship position as well as providing accurate information about the collision threat. The proper interpretation of this information belongs to the navigator. He must take into account many variables affecting the assessment of the situation and then make the right decision regarding anti-collision manoeuvres. This assessment could be made easier for him with use some form of graphic target data presentation methods other than currently required and described in IMO performance standards. Other possible graphic presentation methods of collision information are described in the article along with the concept of their usage.
DOI: DOI: 10.1515/aon-2018-0002
 Bole A.G., Dineley W.O., Wall A., Radar and ARPA Manual. Second Edition,
 Galor W., An assessment of ship encounter situations based on predicted points of collisions. Scientific Journals of the MU of Szczecin, 2016.
 IMO Resolution A.422(XI) Performance standards for Automatic Plotting Aids (ARPA).
 IMO Resolution A.823(19) Performance standards for Automatic Plotting Aids (ARPA).
 Juszkiewicz W., The influence of radar picture stabilization type into anti-collision
manoeuvre planning accuracy. Annual of Navigation no. 21/2014.
 Juszkiewicz W., Nowy A., The verification of automatic drift calculation accuracy
in ARPA. Scientific Journals of the MU of Szczecin, 2016.
 Resolution MSC.192(79) Adoption of The Revised Performance Standards for Radar
 SOLAS Convention.