The Forces say HMCS Whitehorse helped the U.S. Coast Guard intercept a vessel, where they found 15 bales of cocaine floating in the water nearby.
They say this is the second big drug bust for HMCS Whitehorse this year.
In early March, the military says the ship helped the U.S Coast Guard seize more than 5,000 kilograms off Costa Rica.
The Canadian Armed Forces say they are part of an international operation to prevent drug trafficking.
They say their role is to locate, track and approach suspicious vessels.
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