Wills helps navy locate and monitor smugglers
He manned a Lynx helicopter, from where he helped locate and monitor smugglers on a sinking speedboat off Barbados.
The freighter Iron Duke then swooped in for the bust.
Wills – Sub-Lieutenant Wales – also helped bring the haul on board alongside a US Coast Guard detachment.
Commander Mark Newland praised the royal for his part in the mission.
‘This was a very challenging operation that unfolded over 3 days,’ he tells the Daily Mail. ‘Sub-Lt Wales was an integral part of the team and, as an Army officer trained in surveillance, added real value to it.
‘This was a major operation – we don’t take people along for joy rides. Sub-Lt Wales has proved to be a very good sailor with no hint of sea-sickness yet.’
William, 26, is on a month-long training post in the West Indies with the Royal Navy.