Ed 2 North Brittany page 71
Behind the white waiting bouys outside the lock there is a forest of large yellow bouys.
These have been installed by the Region at enormous expense to assist the fishermen so that they do not have to go through the lock to unload their catch. Unfortunately they are too close together so are little used.
It is perfectly acceptable to use, with caution, one or fore and aft while waiting for the lock to open.