As if the world hasn't got enough problems right now the US is getting a bit uptight about 5 Iranian oil tankers, one of which I've shown here on the plot. Despite the fact that Venezuela is literally floating on oil, they have a fuel shortage due to refinery problems. So these ships (product carriers carrying refined product I should think) are inbound from Iran with a supply. Both countries of course are under sanctions by the USA.
I did quite a bit of trading on the Venezuelan coast back in the day, also on a product carrier so I know some of those ports you can see.
The red plots are tankers, but if a faded red, the plot is possibly not updating. Could be they've switched off the AIS tracking system !!