For example the median expected annual pay for a typical Psychiatrist in the United States is $205,390, so 50% of the people who perform the job of Psychiatrist in the United States are expected to make less than $205,390.
Lightering (also called lighterage) is the process of transferring cargo between vessels of different sizes, usually between a barge and a bulker or oil tanker. Lightering is undertaken to reduce a vessel's draft in order to enter port facilities which cannot accept very large ocean-going vessels.
How many barrels of oil does a tanker truck hold? A gasoline tanker truck holds 9,000 gallons of gasoline. Since a  barrel of oil is 44 gallons, one can assume that an oil tanker  truck can haul about 200 barrels of crude.