supertankers
Supertanker is a term used to describe the largest classes of merchant oil tankers used to transport crude oil and refined products. In shipping industry parlance, the term typically encompasses ultra large crude carriers (ULCCs) and, less strictly, very large crude carriers (VLCCs). ULCCs are defined as ships with deadweight tonnage (DWT) exceeding about 320,000; VLCCs range from roughly 200,000 to 320,000 DWT. Depending on oil density, these ships can carry several million barrels of crude on a single voyage.
Most supertankers are built with double hulls and multiple segregated cargo tanks to minimize spill risk and
Key examples include the Seawise Giant, later known as Jahre Viking and Knock Nevis, which at construction
Environmental and regulatory considerations shape their operation. International conventions such as MARPOL and SOLAS govern safety