Running Fix is a position determined by crossing lines of position obtained at different times and advanced or retired to a common time. How many NAVAIDs are used?

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Multiple Choice

Running Fix is a position determined by crossing lines of position obtained at different times and advanced or retired to a common time. How many NAVAIDs are used?

Running fix relies on two lines of position that come from observations at different times, adjusted to a common time so you’re comparing positions that correspond to the same moment. You don’t need multiple NAVAIDs to do this. The same beacon can provide two observations: take a bearing (or range) to that NAVAID at two different times, draw two lines of position through the NAVAID corresponding to those observations, and advance (or retire) one line to the common time. When you plot both lines on the chart at the same time, they intersect at the ship’s position. That means only one NAVAID is used to obtain the running fix.

Running fix relies on two lines of position that come from observations at different times, adjusted to a common time so you’re comparing positions that correspond to the same moment.

You don’t need multiple NAVAIDs to do this. The same beacon can provide two observations: take a bearing (or range) to that NAVAID at two different times, draw two lines of position through the NAVAID corresponding to those observations, and advance (or retire) one line to the common time. When you plot both lines on the chart at the same time, they intersect at the ship’s position. That means only one NAVAID is used to obtain the running fix.

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