Running Fix (Navigation) - Explained in 3 Mins
The Running Fix – Step-by-Step Nautical Navigation Tutorial
At sea, knowing your exact position is vital for safe navigation. But what if you can only see one navigational aid, like a lighthouse? That’s when you use The Running Fix — a practical method for determining your vessel’s position using two bearings of the same object taken at different times.
In this video, we break down how to determine a running fix position with a real-world scenario:
Bearing a lighthouse at 0800 hours: 090° True
Course: 125° True, Speed: 8 knots
Bearing the same lighthouse at 0900 hours: 013° True
We’ll walk you through the step-by-step plotting process:
Plotting the first Line of Position (LOP)
Plotting the second LOP
Drawing the vessel’s course
Measuring distance travelled
Advancing the first LOP
Finding the fix
By the end of this tutorial, you’ll be able to confidently apply the Running Fix method in any navigation situation.
⛵ Perfect for: Marine navigation students, deck cadets, and professional mariners preparing for exams or improving chartwork skills.
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