To get a sense of Sekula and Burch's film, you can watch this 18-minute segment, on container shipping -
https://www.youtube.com/watch?v=HbDyD40-cyk
Two commentaries as follow-up -
https://www.bfi.org.uk/news-opinion/sight-sound-magazine/comment/world-sea-forgotten-space
https://www.afterall.org/online/material-resistance-allan-sekula-s-forgotten-space#.W-ILRVKYTR0
On Allan Sekula, whose photographic book Fish Story is the precursor text for the film -