Question to the Department for Transport:

To ask His Majesty's Government what assessment they have made of (1) the current state of the global crude oil fleet, and (2) the number of vessels that have 'gone dark' since Russia’s invasion of Ukraine.

The Department for Transport holds data on the number and type of vessels within the world fleet, and as of 31 December 2023 there were 15,700 chemical and oil tankers in the world fleet with a total deadweight tonnage of 714 million tonnes.

The Government are aware of 'going dark' activities conducted by vessels since the Russian invasion of Ukraine. However, it is not possible to ascertain the exact figure of 'dark vessels' or 'dark periods', as while they can be due to deceptive practices, they may also be for safety reasons in high-risk areas or arise from technical issues and GPS jamming. The Joint Maritime Security Centre (JMSC) have established a (Russian) Maritime Sanctions Assessment Team focusing on the movements of oil tankers that are assessed to be associated with the movement of Russian oil.