For 28 months, from March 2011 to October 2013, the researchers used a hydrophone placed 50 meters offshore in the center of the orcas' summertime habitat to measure the noise from 1582 individual ships, including ore carriers, tugs, oil tankers, cargo, military, yachts, and fishing vessels.
For many years strategists have speculated on the possibilities of tankers, cargo ships and transports that could navigate under water.
Some of the tanker's cargo spilled and also caught fire.
Villagers were thronging to loot the tanker's cargo when it erupted in flames.
Supertanker, large tanker or cargo ship, commonly an oil-carrying vessel that might exceed 500,000 tons deadweight.
The central government of Iraq, despite recent military setbacks, dispatched its American lawyers to do battle in the federal court in southern Texas, where a judge ruled that the tanker's cargo, worth about $100m, should be seized if it came within Texas state waters.
At the moment, it generally costs about twice as much to build a commercial vessel -- whether a tanker, a cargo vessel or a cruise ship -- in the United States than it does overseas, where lower labor costs, advanced technology, indirect government supports and greater manufacturing efficiencies have brought shipbuilding costs down.
A pumproom houses all the pumps connected to a tanker's cargo lines.
In Libya, Delta Force commandos successfully captured an al-Qaeda militant in an early morning raid, while SEALs commandeered an oil tanker with cargo from Libya that the weak U.S.-backed government there considered stolen.
The accident led to a major spill of the tanker's cargo of oil, with the first black oil-laden tide arriving on the Galician coast on 16 November.
