Which statement best describes a Running Fix?

Which statement best describes a Running Fix?

• A. Limited Objects Are Available for Taking LOPs and the Vessel Remains on a Constant Course. Advances or Retires a LOP Taken to the Same Object at Two Different Times to Fix the Vessel's Position
• B. Common Intersection of Three or More LOPs at a Common Point Obtained From Simultaneous Observations
• C. Starting Point, Course & Speed, Time & Distance
• D. GPS and Radar Ranges Used for a Position Fix

Answer: (A)

A running fix is a position determined when you have only a few visible objects and you’re moving on a steady course. In this method you observe the same object at two different times, each observation giving a line of position. Because you assume the vessel kept the same course and speed between those times, you advance (or retire) the first line of position to the second time by the distance you would have traveled in that interval. The intersection of the advanced line with the second line gives you the vessel’s position at the second observation. This approach suits situations with limited visible objects, avoiding the need for three simultaneous lines of position.

A running fix is a position determined when you have only a few visible objects and you’re moving on a steady course. In this method you observe the same object at two different times, each observation giving a line of position. Because you assume the vessel kept the same course and speed between those times, you advance (or retire) the first line of position to the second time by the distance you would have traveled in that interval. The intersection of the advanced line with the second line gives you the vessel’s position at the second observation. This approach suits situations with limited visible objects, avoiding the need for three simultaneous lines of position.