not in French territory or possessions
How can the company or crew be expected to be subjected to French law?
Mayotte is a French department
Ref Wikipedia
Mayotte is French since 1841 (purchase of the island), the rest of the Comoros is a mere protectorate since 1886, the result of the referendum is interpreted island by island. In addition, the constitution does not give independence without the consent of the population. Mahoran consultation was negative, in contrast to other islands, Mayotte will remain in the status quo ante. Mayotte is French since 1841, it could be maintained French.
This difference of opinion remains from a recurring topic between the two States diplomatic tensions.