Doubtful. The 200 grt charting is a little more complex than the 100 grt master. Pretty sure there are some tides and current questions, for example so most likely there is no way around taking a 200 grt test at the REC or an approved upgrade course at a school. Usually the 200 grt upgrade is the first week of a 500/1600 prep course but you can test at the school.