"I've been coming to Singapore once a year for the last 15 years, and flying in I have never seen the waters so full of idle tankers," said a senior European oil trader a day after arriving in the city-state.

The red dots show ships either at anchor or barely moving, either oil tankers or cargo, which have made the Straits of Malacca, one of the world's most important shipping lanes which carries about a quarter of all seaborne oil primarily from the Persian Gulf headed to China, into a "bumper to bumper" parking lots of ships with tens of millions of barrels in combustible cargo.