Tankers for the carriage of crude oil, petroleum products, chemicals and gas, from coastal tankers to very large crude carriers.

Tankers are sold under sale and purchase agreements with class and flag documents, delivered afloat with surveys and cargo tank records. Vessels are sold under a bill of sale with builder certificate, class society certificates (IRS, LR, DNV, ABS), flag-state registration and deletion certificate, survey reports and export clearance; delivery is usually afloat under own power or tow, or by heavy-lift transport for small craft, with engines and equipment listed on the invoice.