Care must be taken to assure that a found disk is the one described on the data sheet, so as to avoid false reports. A reference mark may be mistakenly reported as the station mark. A disk set in 1945 may be confused with a similarly named disk that was set in 1946 by a different agency, and so on. A RESET elevation benchmark should not be reported as the original. Sorting out these differences and reporting them correctly is an important part of the hobby.