Data from MarineTraffic, for example, a platform that shows the live location of ships around the world using those on-ship tracking systems, indicates that traffic from Russia’s major ports declined after the invasion, but did not plummet. The number of container ships, tankers and bulkers — the three main types of vessels that move energy and consumer products — arriving and leaving Russian ports was down about 23 percent in March and April compared with the year earlier.
“The…