🔍 Key Concepts

• Meaning of the prefix "P" in the term P-tank on oilfield supply vessels • How dry bulk cargoes like cement, barite, or bentonite are stored and moved on OSVs • Difference between pressurized dry bulk tanks and tanks used for liquids or simple air storage

💭 Think About

• Think about what kind of materials offshore supply boats commonly move in special tanks that use air pressure to blow cargo ashore or to the rig. • Ask yourself: which of these choices actually describes how dry drilling materials are typically carried and discharged? • Consider whether a single type of tank on an oilfield supply boat would normally be designed to handle both dry powders, liquid mud, and serve as a general air reservoir.

✅ Before You Answer

• Verify which cargoes are normally carried in pneumatic dry bulk systems on offshore supply vessels. • Check whether compressed air storage at 100 psi is usually in dedicated air receivers, or in the same tanks that carry cargo. • Confirm whether a P-tank is associated more with dry bulk or with liquid mud systems in oilfield operations.