The correct answer is C) The longitude is 3°25'. The format "G0325" is a common way to express longitude coordinates, where the "G" stands for "Greenwich" (the prime meridian), and the following numbers represent the degrees and minutes of longitude. In this case, "0325" translates to 3 degrees and 25 minutes of longitude. The other options are incorrect because they do not align with the standard format for expressing longitude coordinates. Option A refers to a course heading, Option B refers to a course direction, and Option D refers to a distance, none of which match the provided signal format.