Prince William took part in a British navy helicopter raid that opened fire on a speedboat believed to be used by drug runners, the Ministry of Defense said Saturday.

It was the second time the prince — known in the Royal Navy as Sub-Lt. Wales — helped his crew mates on the HMS Iron Duke go after suspected narcotics traffickers in the Caribbean as part of his program to gain experience in all the branches of the British armed forces.

A military spokesman said the Iron Duke intercepted the speedboat on July 18 about 110 miles north of Venezuela's and Colombia's coastlines.

William was the lookout on the Lynx helicopter deployed to track the boat as marksmen shot out the vessel's engine. The military said commandos from the Royal Marines aboard the helicopter used high-power, long-range rifles to disable the 30-foot vessel after it tried to evade detection and ignored warning shots.