Off Shore Oil Rig - Is a large structure with facilities to drill wells (optionally), to extract and process oil and natural gas, or to temporarily store product until it can be brought to shore for refining and marketing.
Oil Tanker - Is a merchant ship designed for the bulk transport of oil. There are two basic types of oil tankers: crude tankers and product tankers.
Number of sheets:
Oil Tanker Ship: L4.8" x W0.9" x H1.18"
Offshore Oil Rig: L1.61" x W1.61" x H3.27"