Re: canal des deux mers (Canal of the two seas)
For a start I would make sure we are all talking about exactly the same route. My experience was only one section of the Canal du Midi and we were told it was 1.5 m if you were lucky. This is of particular interest since our boat is 1.5 m, but I think we would have problems with our mast and the curved lock walls.
Finished the circumnavigation in early February in Grenada. Have to work on a book project for the next several months so the boat will be waiting for next year.