Thanks so much for your input!!! very helpful!
I'll probably go ahead and use it. And i'm going to check for a museum nearby
Would you recommend I still refer to the image details in my book? or that would not be necessary?
I did take some photos myself of maritime charts. Would this give me copyright? These chart are from the last 10-15 years though so I guess not. But would it be ok to use the photo and modify it?