On 24 September 2019, the Coast Guard reported that the Valiant, along with four Colombian naval assets, intercepted a 40' long drug-smuggling semi-submersible carrying 12,000 lbs. of cocaine in the Pacific Ocean. The submersible was spotted by maritime aircraft prior to asking the Valiant for assistance. The cocaine was estimated to be worth $165 million. Only 1,100 lbs. of the cocaine could be recovered from the submersible before it was sunk due to safety issues. The exact location where the submarine was found was not disclosed. Four men were taken into custody.