A , steel-hulled North Vietnamese trawler , attempting to infiltrate "Market Time" patrols with a large cargo of arms and ammunition for the Viet Cong, was detected by near the mouth of the Cổ Chiên River in the Mekong Delta. A chase and fire fight followed, during which the Coast Guard cutter forced the enemy trawler aground and the enemy abandoned the burning ship. After wiping out enemy shore resistance, "Market Time" units, including "Haverfield", sent volunteers on board to fight fires and salvage the captured cargo. While American and South Vietnamese teams extinguished the fires, other volunteers offloaded almost 80 tons of ammunition and arms, including mortars, recoilless rifles, machine guns, and antitank weapons. This represented the largest seizure of the "Market Time" operation and thwarted a determined attempt by the North Vietnamese to supply the Viet Cong.