I got my Dear John letter from the Nmc the other day.I’m trying to get approved for 500T master nc testing. The Nmc will not take my seatime from my last employer, saying that the vessel I served on was classified as a towing vessel and since I do’nt have a towing endorsement the time can’t be used. The vessels were not used as towing vessels,only for supply,parts and passenger transfers.My eval. lady told me the only thing I could do is get a letter from the company stating this and send it back to them.These vessels were at Naval Station Ingleside,old landing craft with bows welded on. Also the Nmc just renewed my current 150 masters nc in Sept. 09 with the same sea service letter.Please correct me if I’m wrong, can I not be the master on a vessel that is classified as a towing vessel,as long as that said vessel is not engaged in towing? Thanks for any and all info.