just had a look and have converted the linesplan into CAD, the reported resolution was 72dpi, this means the text hasnt converted at all well - random lines and squiggles. I then used the ship length to rescale the CAD .dxf file to full size (approx 20244mm) - appox 5x the original scale it came into CAD at, this is generally the problem, getting a dimension to scale things to, a measured dimension on a plan or overall length is a boon. (if you want a CAD copy in dxf format of the lines plan send me a PM with your email address and I'll send you a copy, its about 1.4Mb).
at my old job I could scan in my own plans and convert them, controlling each step in the process I could optimize the resolutions to get the best out of my image to CAD conversion software (usually 200 dpi for the best results). my new job gives me access to a scanner capable of A3 and a large format printer, plus I still have my conversion software.
Grendel