Question 764Navigation General

The correct answer is D) All of the above. Chronometer error can be found by using any of the methods listed in the answer choices: 1) Comparison with a timepiece of known error, such as a GPS time signal or radio time signal 2) Listening to a radio time signal to determine the chronometer's error 3) Applying the chronometer's established rate to previous readings to calculate the current error All of these methods are valid and accepted ways for a mariner to determine the error of their chronometer, which is essential for accurate navigation. The other options are not incorrect, they are simply subsumed within the correct "all of the above" answer.