The Vessel Experience Factor (VEF) plays a crucial role in shipping operations, particularly in the oil and gas industry. This factor helps determine the accuracy of a ship’s cargo measurements, offering valuable insight into the discrepancies between ship and shore figures during loading and discharge operations.

The VEF is a computation of the history of the Total Calculated Volume (TCV) loaded by the vessel adjusted for OBQ or ROB, compared with the TCV of shore measurements, typically a Bill of Lading in order to compute a load port VEF for the vessel.

Jul 24, 2016 · For any given vessel a simple ratio can be found between the quantity of liquid measured on board the vessel and the corresponding measurement by a load or discharge facility. A historical compilation of this ratio, typically over 10 voyages, is known as the vessel experience factor (VEF).

In this article we look at how vessel experience factor (VEF) is derived and applied. The VEF is the historical difference in the ship and shore figures for a ship over a period of time. A VEF is used to assess the validity of quantities delivered to …

Dec 23, 2015 · This ratio, called a Vessel Experience Factor (VEF), is an empirical data stream of shore-to-ship cargo quantity differences collated from previous voyages, and is used as a loss control tool to assess the validity of quantities derived from external sources.

The VEF was initially developed as a loss control tool; and, while the Standard (Edition 3 of API Chapter 17.9/EI HM 49) was revised in July 2019, the basic concepts have changed little since it was first issued as Appendix C to API MPMS Chapter 17.1, back in the 1990s.

Jul 1, 2019 · This standard provides guidelines for data compilation, data maintenance, data validation, and recommendations on the appropriate use of a VEF involving marine vessels.

Dec 12, 2012 · The VEF is applied by dividing the ship’s figures by the ratio (VEF) which is a number either greater or less than 1.0000 to 4 decimal places. If it exceeds 1.0000 then the ship figure is over the shore. If it is less than 1.0000 then the ship figure is under the shore.

This paper addresses cargo calculations and ullage surveys in maritime operations, focusing on the vessel's experience factor (VEF) and its calculation based on qualifying voyages.

VEF Calculation - Procedure - Introduction For a particular vessel, an approximately constant ratio can be established between the quantity of oil measured on board the vessel and the corresponding measurement by a shore terminal.