Maritime plywood could be graded as being compliant with BS 1088, which is a British Standard for maritime plywood and is also:710 is Bureau of Indian Specifications (BIS) for maritime grade plywood. You will find several Global standards for grading maritime plywood and a lot of the standards are voluntary. https://juliuseffed.nizarblog.com/23972447/5-tips-about-plywood-you-can-use-today