Õ: kohatine "veoühik" ei vasta mõiste sisule:
unit on siin veovahend, mitte kogusemõõt

olemus
ISO 22300:
kaubaveok, kaubavagun, konteiner, paakveok, paakvagun, veopaak
=
road freight vehicle, railway freight wagon, freight container, road tank vehicle, railway tank wagon or portable tank

ülevaateid
https://sicurezzadelcarico.it/index.php/en/cargo-transport-unit/

https://www.ttclub.com/media/files/tt-club/cig/cigctu-code-a-quick-guide-sep-2020.pdf

https://unece.org/fileadmin/DAM/trans/doc/2014/wp24/CTU_Code_January_2014.pdf