Malaccamax is a naval architecture term for the largest tonnage of ship capable of fitting through the  Strait of Malacca. Bulk carriers and supertankers have been built to this tonnage, and the term is chosen for very large crude carriers (VLCC).
Malaccamax is a term used to describe the largest ship size capable of navigating through the Strait of Malacca.  Bulk carriers and supertankers have been designed to this capacity, and it's often applied to very large crude carriers (VLCC).