Also, if the vessel or vessels you get signed off on doesn't have a heavy fuel oil purifier, your RFPEW will be limited to "vessels without a auxiliary or waste heat boiler". That's what I have.
I am pretty sure that a DDE Unlimited isn't high enough to sign off on the assessments. I remember when I was going through all this that it had to be a 2nd A/E unlimited, but a Chief Engineer Limited was okay too. I had both of those sign off on my assessments. Never heard DDE Unlimited was okay. I would double check that.
Ship Engines - http://www.flickr.com/photos/robbynorman/sets/72157603921324598/
Ships around the World - http://www.flickr.com/photos/robbynorman/sets/72157606763159635/