The International Maritime Security Construct is set to get underway with Operation Sentinel.
The US-led, six-country coalition organised to ensure freedom of navigation in and around the Strait of Hormuz circulated a flyer in October outlining a mission involving ships large and small alongside aircraft.
Larger ships, identified as "sentinels", will patrol "critical choke points" while smaller "sentry" ships will police more open water alongside airborne surveillance.
The group will be based in Bahrain.
The coalition was launched in July by the US in response to tanker attacks allegedly carried out by Iran, purportedly lashing out over the US reimposing sanctions after withdrawing from a 2015 deal over the Islamic republic's nuclear programme.
The US has a policy of "maximum pressure" on Iran, including levying increasingly onerous sanctions on Iran, which are impacting the country's economy and, most recently, supercharging tanker rates in mid-October.
The International Maritime Security Construct is made up of the US, UK, UAE, Australia, Bahrain and Saudi Arabia.
The flyer — which has "Additional Countries Welcome" emblazoned alongside each of the country's flags — said "other nations have expressed an intention to join imminently".
Several countries, including France, Germany, Japan and India, have declined to join.
