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The "LOP Observation" section focuses on the process of observing and calculating positions based on Lines of Position (LOP). This function is crucial for accurately determining the vessel's location on the chart using visual or radio-based landmarks.
In this section, you will learn how to create and configure observation points on the map, set bearings and distances to these points, and calculate and apply observation coordinates to adjust navigation data. Understanding and effectively using these tools will enhance your navigation accuracy and improve route planning.
4.3. LOP Observation
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4.3. LOP
Part 4 - Instruments
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Part 4 - Instruments
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Part 1 - Interface
Select 'Part 1 - Interface' to start the tutorial. After successfully completing this part, new sections and all subsequent ones will be accessible in this menu.
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The currently examined element is indicated by a green outline and numbering. Explanations will be provided in this window. After reviewing the information, click the 'Next' button or follow the instructions. If you wish to go back to the previous step, click 'Back'. If you decide to finish the study prematurely or choose another section, click 'End'.
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To navigate to the LOP Observation, click the "LOP" button located in the block of main buttons on the main panel.
Basic Program Control Buttons
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To create a new observation point, click on the map to open the context menu. In the context menu, select the option "Add Point". This will allow you to set a new point on the map, which can be used for observations and position line calculations.
Creating a New Observation Point
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In the context menu that appears, click "Add point" to create the point.

To continue, click "Add point".
Adding an Observation Point
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The point is created, now we will set the bearing to the point relative to our position. To do this, click on the "Bearing" field. In this field, you can enter the bearing in degrees, which will aid in future navigational calculations.
Setting the Bearing to the Point
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In the window that appears, enter the bearing in degrees. To confirm, press the OK button. This will allow the program to consider the entered bearing for further calculations and display on the map.

To continue, click "OK".
Entering the Bearing
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Now we will specify the second point in the same way. Adding the second point will complete the creation of the observation line and allow for a more accurate position determination.

To continue, press "Add point".
Specifying the Second Point
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Specify the bearing for the second point relative to our position. This will allow you to set the exact course for the second point.

Click on the "Bearing" field to continue.
Specifying the Bearing for the Second Point
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In the window that appears, specify the bearing in degrees, and then click OK to confirm. This will allow you to set the exact direction to the second point.
Specifying the Bearing in Degrees
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The program has calculated our position. Additionally, you can specify the distance to the points similarly to how you set the bearing. To set the distance to the first point, click on the "Dist." field.
Specifying the Distance to Points
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In the window that appears, enter the distance to the point in nautical miles (nm). To confirm your input, press the OK button.
Specifying the Distance to a Point
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Next, specify the distance to the second point. To do this, click on the "Dist." field.
Specifying the Distance to the Second Point
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In the window that appears, enter the distance to the point in nautical miles (nm). To confirm your input, press the OK button.
Specifying the Distance to a Point
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The program has calculated the observation coordinates. To accept this position for Dead Reckoning, click the "APPLY" button next to the observation coordinates.
Accepting Coordinates for Dead Reckoning
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Click "Yes" to confirm the acceptance of the observation coordinates for Dead Reckoning.
Accepting Coordinates for Dead Reckoning
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The vessel's position calculation is complete. You can now use the obtained coordinates for further route planning or adjusting navigation data.
Completion of Vessel Position Calculation
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The "4.3. LOP" section has been completed.

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