Mining and energy giant BHP Billiton is trialing the use of drones to speed up its port operations. The firm intends to deploy small unmanned aerial vehicles to take draft readings and inspect holds on giant bulkers as they wait to load rather than dispatching human inspectors for the purpose. BHP VP of marketing freight, Rashpal Bhatti, is a prominent technological evangelist in shipping, and he believes that information collected by drones will one day feed into the BHP-supplied tablets that...