I have a question regarding upgrading from a 1600 master to thirdmate. Is it possible to use ITC time from a ATB to upgrade to thirdmate. I have over 10 years sailing a master on ATB's. I know the cfr's state that sailing 1 year as master on vessels over 200 grt qualify you to sit for thirdmate unlimited. The tug is 199 grt and the barge is 19073 grt. I know there is a navic out for using ITC time and the itc tonnage is 1077 for the tug. Is it possible to use the ITC tonnage to qualify for vessels over 200 tons?