I really don't think there is an issue in this particular circumstance Paul. If you were going to use the plans to build a full size ship it might be different but producing a model of a ship which is 17 years old and currently laid up in Turkey is hardly likely to induce a flurry of lawsuits! The location supports Richard's suggestion that the ship is destined for scrapping.
Personally in this situation, I wouldn't hesitate to use these plans for a personal one off model if it attracted me as a project.
Back in the early 1980s I bought a copy of the Denny build plans of the Isleof Wight Ferry Shanklin commissioned by the Southern Railway from the National Maritime Museum for the then rather large sum of £50.
I built my model and the then owners of this magazine commissioned Dave Metcalf to produce a set of model maker's drawings from the Denny plans which were published under my name. These plans went into the Model Boats Plans Service and are still available from Sarik. They are also listed by a small outfit in Canada who are offering a mixture of old Nexus plans, some of which are still listed by Sarik and some of which are no longer available from them.
As far as I can tell, nobody seems too bothered about it all.
It is more of an issue when plans of modern ships are circulated which might breach commercial confidentiality and in that case you do need to get the requisite permissions. The RNLI are also very touchy about people publishing their lifeboat plans.
I am currently building the liner Miltiades of 1903 from photos of plans held by the National Maritime Museum. I was allowed to photograph the plans for free on the basis that the images were for my personal use only.
So basically it all seems to boil down to whether you might be infringing commercial confidentiality (modern vessels) or commercial copyright if you are reproducing plans which are currently on sale by the legitimate copyright holders who are expecting to derive an income from them.
There are hundreds of model making plans based on full size vessels which are commercially available. Some of those have derived from information given freely by the shipowners/shipbuilders whilst others have been compiled from information in the public domain.
From the model maker's point of view, I think there is only an issue if you are duplicating plans on sale by copyright holders or reproducing information which might be commercially sensitive.
I really don't see any problems with Richard's offer whatever the theoretical issues might be.
One has to be pragmatic in these situations. If a model of Maersk Advancer were to be built then just who would be financially disadvantaged by it?
Colin