A sanctioned tanker carrying some 300,000 barrels of naphtha from Russia entered Venezuelan waters late on Thursday, while three others also under sanctions either stopped navigation or began redirecting course in the Atlantic Ocean, ship tracking data showed, a sign of last-minute decisions by ship owners amid U.S. President Donald Trump's "blockade" of all oil tankers under sanctions bound for the OPEC country.Trump on Tuesday ordered a "blockade" of all sanctioned oil tankers to and from the South American country…