For many years, dynamic measurement systems have not been used in the petroleum industry for custody transfer applications, only for operational reasons like detecting leaks and internal transfers. The progressive growth of crude oil prices required measurements with a smaller uncertainty, leading to developing news technologies, resulting in high accuracy flow meters to be used in custody transfer. The main objective of this research was evaluate the replacement of static measurements by dynamic measurements in oil exports sales in order to speed up the loading of vessels, decreasing the unavailability of logistical resources involved, to minimize the company s exposure to economic losses due to erroneous bill of ladings and verify if this justifies the investment in dynamic measurement systems. This research has discussed a number of issues associated with the uncertainty of the shore tanks, vessels tanks and dynamic measurements, evaluating procedures, equipment, and restrictions, problems and accuracy associated with each method. It also included a discussion about the difference between calibration of vertical cylindrical tanks procedures used in Brazil by Inmetro and the requirements of ISO -7507, and about traceability of measuring equipment calibration.