Patent ID: 7768443

Claim:
A vessel monitoring system comprising: a calculator for calculating an Obstacle Zone by Targets, based on a course and a speed of a target vessel and a course and a speed of an own vessel, for a case in which the course of the own vessel is changed to an arbitrary direction, the Obstacle Zone by Targets indicating a region which the own vessel reaches the same location at the same time as the target vessel with equal to or more than a predetermined probability; a display unit for displaying positional relation between the own vessel and the target vessel, as well as the Obstacle Zone by Targets obtained by the calculation by the calculator; and an integrated controller for processing trial navigation that, in a trial navigation by provisionally setting a value of the speed of the own vessel arbitrarily, integrally controls mutually cooperated processing of the calculation by the calculator and the display by the display unit, so that the calculator calculates the Obstacle Zone by Targets corresponding to the arbitrarily and provisionally set value of the speed of the own vessel, and the display unit displays the result.