Marine plywood is usually graded as becoming compliant with BS 1088, that is a British Typical for marine plywood and it is:710 is Bureau of Indian Standards (BIS) for maritime grade plywood. There are actually several Worldwide benchmarks for grading maritime plywood and a lot of the standards are voluntary. https://qi-wireless-charger76319.targetblogs.com/24094181/an-unbiased-view-of-plywood