Amid dimming expectations that next week's talks in Moscow will defuse the U.S.-Iranian confrontation in the Persian Gulf, the U.S. Navy has sent four additional mine countermeasures ships to the region to oppose an Iranian threat to close the vital oil artery.
The deployment doubles the number of mine-hunting warships the U.S. 5th Fleet, which has headquarters in Bahrain, will have operating in the region, through which one-fifth of the world's oil supplies pass.
The U.S. Navy has identified the mine-hunters as the Avenger class USS Sentry, USS Devastator, USS Pioneer and USS Warrior out of San Diego.
These slow-moving 1,379-ton ships, all transported to the gulf aboard heavy-lift vessels, will join their forward-deployed sister ships USS Scout, USS Gladiator, USS Ardent and USS Dextrous.
The British navy also has four mine countermeasures vessels in the gulf.
The Americans plan to deploy at least four mine-sweeping MH-53E Sea Dragon helicopters to the gulf as well.