There is no general rule that prohibits people with tattoos from working on a yacht. However, it is important to keep in mind that the policies and preferences of individual yacht owners and charterers may vary, and some may have specific requirements or preferences when it comes to tattoos and other personal appearance matters.
For example, some yacht owners or charterers may have a dress code or appearance policy that prohibits visible tattoos or limits the size or placement of tattoos. Others may have no specific requirements or preferences when it comes to tattoos.
It is always a good idea to carefully review any dress code or appearance policies that apply to your employment before accepting a position on a yacht, and to consider whether your tattoos would be in compliance with these policies. If you have any concerns or questions about the policies that apply to your employment, it is a good idea to discuss them with your employer or a maritime lawyer before accepting the position.