Dan Kaufman must be the only person who tracks vessels on AIS to find out the hull colour of container ships.

Kaufman’s colour searches date back to the day he was photographing a panorama on the Savannah River, Georgia, in the southeast US, downstream from its port, “when suddenly my field of view went black. I looked up instantly to see a 900ft containership just 30ft away, and started shooting instinctively.”

When he printed the day’s shots, he realised that the blocks of colours he had captured carried unmistakeable echoes of the art of Mark Rothko, the Russian-American abstract expressionist.