3000 GRT to 6000 ITC

I know there have been many discussions about the 3rd Mate limited, but I have not seen this discussed. How does one go about getting an ITC endorsement on a 3rd mate 3000 GRT license? It seems to be a catch 22 you need time over 1600 GRT to remove tonnage yet vessels over 1600 GRT are only classed under ITC. Any help is appreciated.

http://www.uscg.mil/nmc/checklists/default.asp

180 days as mate on vessel over1000 itc.
Then 56 as an observer on a vessel greater than 3000. Read the checklists then reference the CFR. Captain said I must not have a life for reading CFR’s, but I learned quit a bit that has served me well when dealing with my application packet.

I concur…you don’t have a life! LOL