Oil tankers

U.S. authorities have been slow to catch on to the spread of technology that has been part of the electronic warfare arsenal for decades but is only now cropping up in commercial shipping, the co-founder of a maritime intelligence company says.

Five Iranian tankers likely carrying at least $45.5 million worth of gasoline and similar products are now sailing to Venezuela. It’s part of a wider deal between the two U.S.-sanctioned nations amid heightened tensions between Tehran and Washington.