I just upgrade from DDE 1000 to DDE 4000. Here’s how it went:
To upgrade the licence I just had to submit a drug test and sea time. I did not have to take any new tests. I also submitted a physical to renew my MMD. When I submitted my sea time, I only sent in my latest sea time letter with 480 days on it. I assumed that they could figure out that I already had at least 360 days from my DDE 1000, but not so. They sent me a letter saying that I needed to submit more information and that they would pull my federal record to check for previous sea time. I emailed them my previous sea time letter, and they printed my MMD the next day.
When I got my MMD back it had improved a lot my ratings. My STCW95 ratings went from “III/1” to “III/1; III/4; III/5.” I got “Able Seafarer - Engine” and RFPEW. A very interesting change is that my OICEW no longer is limited by tonnage or near coast waters. My limitations only read “Not valid in ships in which steam boilers or gas turbines form part of the propulsion system. Valid on ships of not more than 4,000 Horsepower (3,000 kW).” My QMED ratings upgraded to “Any Unlic Engine Rtg”
Hope this info helps any of you guys looking to upgrade in the near future.