I have been attempting to find out what exactly all the requirements are for obtaining a 1600 GT Masters Ticket. I have a 3M AGT ticket, STCW, GMDSS … though I do all of my work on board tugs. All the tugs have been over 500 GT. I currently have 490 12HR days on the Great Lakes, 60 12hr days East Coast and 90 12HR days West Coast for a total of 640 12hr days which should equal 960 8 hour days if I’m correct. Due to the tonnage I am not able to upgrade to 2/M. My question is, am I qualified to get my 1600 Ton Master ticket or do I need to do something else. If I am qualified, which exams do I need to take?? I’ve looked over the USCG Deck Guide and I can’t find where it states a 3/M exam for gettin the 1600 Masters. Thank you for all of your help.