Drone exam · Navigation, charts, and mission data Operations Mapping If a chart file has no known effective date, how should it be treated? Select one answer A Its currency is unverified and it should not be relied on until validated or replaced. B It is automatically current. C It is valid forever. D It is current if the file name is short. Check answer Correct answer: A. Its currency is unverified and it should not be relied on until validated or replaced. Aviation data needs traceable currency.