Method and apparatus for navigation planning

A navigation planning method performed by a navigation planning apparatus having a display, the navigation planning method comprising displaying a chart on the display;

• receiving chart data, wherein the chart data includes position information of a target;
• displaying the target on the chart based on the position information of the target;
• receiving a plurality of waypoints including a latest waypoint for a navigation route of a movable body that has the navigation planning apparatus installed therein;
• displaying the plurality of waypoints of the navigation route on the chart;
• receiving and displaying a potential waypoint as a next waypoint that potentially follows the latest waypoint in the navigation route, the displayed potential waypoint being movable by a user on the chart;
• and
• determining and displaying a position of the potential waypoint while moving the potential waypoint on the chart;
• while the user is moving the potential waypoint on the chart, calculating an angle between a first bar and a second bar that are displayed on the chart,
• wherein the first bar connects the latest waypoint with the potential waypoint that is being moved on the chart, and the second bar connects the potential waypoint that is being moved on the chart with the target;
• when the calculated angle is equal to 90 degrees, outputting an activating signal;
• and
• changing the display of the first and second bars based on the activating signal.

A non-transitory computer readable medium storing instructions that, when executed by one or more processors, cause a computing apparatus to operate as a navigation planning apparatus and to perform a method that comprises:

• displaying a chart on a display;
• receiving chart data, wherein the chart data includes position information of a target;
• displaying the target on the chart based on the position information of the target;
• receiving a plurality of waypoints including a latest waypoint for a navigation route of a movable body that has the navigation planning apparatus installed therein;
• displaying the plurality of waypoints of the navigation route on the chart;
• receiving and displaying a potential waypoint as a next waypoint that potentially follows the latest waypoint in the navigation route, the displayed potential waypoint being movable by a user on the chart;
• and
• determining and displaying a position of the potential waypoint while moving the potential waypoint on the chart;
• while the user is moving the potential waypoint on the chart, calculating an angle between a first bar and a second bar that are displayed on the chart,
• wherein the first bar connects the latest waypoint with the potential waypoint that is being moved on the chart, and the second bar connects the potential waypoint that is being moved on the chart with the target;
• when the calculated angle is equal to 90 degrees, outputting an activating signal;
• and
• changing the display of the first and second bars based on the activating signal.