6] Although this is almost the same as 5], no PCP exits.
The target and DAC are connected with a dotted line.
7] In this case it is impossible to pass through the target ship with keeping set CPA limit value even if any course is taken, because the speed difference is extremely large.
This is sometimes appears when the target is high speed ship.
7.2 Dangerous Territory Avoidance Support System
(OHP-14)
7.2.1 This Dangerous Territory Avoidance Support System is being based on the automatic track control system in accordance with the planned navigation course by use of means the way points steering method.
In this the system of decision making support for a navigator to select a best navigation course by effective information of the electronic chart associated with own ship position and route displayed on the CRT.
7.2.2 An advisory display to show intuitively indication in geometrical related to the ship's psition which has the characteristics of the dangerous territory indication coordinate with planned route, the planning course and avoidance course which course can be decided by results of simulate when a conditions would be changed after the new course to e taken by a navigator.
7.2.3 A dangerous territory has to be shown with color codes for the existing of dangier target(s) of the collision in the zone which width as of own ship's course line to the center.
Furthermore the predict level of the danger to grounding in the route width also be indicated in this function on the electronic chart display is provided Therefore the dangerous territory can be grasped in intuitively known by this.
7.2.4 The decision of the safety course can be done easily with quantitatively in that area and the distance of safe navigation against other ship(s) with the effective judgment through whole conditions which course can be confirmed together, are judgment through whole conditions which course can be confirmed together, are indicated on the scheduled route width then it is effective in present grasing.
The example of safety navigation distance indicated is shown in the figure Fig.7-3.
