Last month, she came across 22kg of marijuana - when she received a tip-off from an American patrol aircraft which reported seeing the crew of a boat suspiciously dumping their payload – a typical practice by traffickers when they’re sighted by the authorities.
"Once again we’ve demonstrated that UK and US forces working in partnership are committed to, and showing success in, reducing the flow of drugs throughout the wider Caribbean," Captain Angus Bissell, RFA Mounts Bay’s Commanding Officer.
Once the narcotics were brought onboard Mounts Bay, tests where conducted which confirmed the sacks contained cocaine estimated to be worth around £190,000.
The drugs have now been handed over to the US Coast Guard for destruction.
Mounts Bay is the UK’s long-term naval presence in the Caribbean.
She sees both her summers and autumns working on disaster relief operations in the wake of hurricanes which strike with devastating frequency, while the rest of her year is focused on counter drugs patrols.