I believe it depends upon WHEN you took your exam. The ‘new’ 3M licenses are good for up to 2M, 1600 ton with no further exam. Just submitting appropriate seatime (near coastal, ocean, or over, 100 GT, or over 200 GT. BUT, if you took your exam prior to (Don’t quote me here) 2003 you have to take a whole new exam. And if you go for oceans, you will have to REtake celestial at an approved school (or pass the actual exam at a REC) The Masters level Celestial has 2 extra questions on it, that you didnt have on a Mates exam. Unfortunately you cant just take the TWO that werent given to you, but you have to do the whole exam.