Yes, it seems you are right even if I wonder about this: "Additional information may be supplied such as surface analysis charts"
I guess this can give plenty of insight because a surface analysis of the same situation can be made to point in several directions.
Anyway I cannot understand how the Groupama navigator is not part of the crew
maybe a mistake but is hard to understand why they have not corrected in all those months.
Even so it is completely different to have a specialized navigator on a team of eleven than to run all the boat by yourself and make also the navigation and that means a lot of time and concentration when you have to be attentive to the immediate needs of the boat. Difficult stuff I would say