A UK naval officer is in charge of running the world’s largest anti-mine warfare exercise in the Gulf.
The US, Canada, Australia, France and Germany are among the 40 nations taking part alongside the Royal Navy, with 35 warships and 6,000 military involved.
The exercise will test new technologies including underwater robots in countering the threat from mines.
It is being seen as a direct response to past threats to block the key shipping lanes.
The International Maritime Exercise Force (IMEF) drill aims to protect the free movement of the shipping lanes and test the response time of the coalition of navies.