On the morning of April 11, 1975, helicopters from the United States Seventh Fleet began circling the VPN transport ships, but they were allowed to move on as the disguised North Vietnamese 'fishing trawlers' were mistakenly identified as ships from Hong Kong.
On April 11, 1975, helicopters from the United States Seventh Fleet started patrolling around the VPN transport ships, but they were permitted to move forward because the North Vietnamese vessels disguised as fishing trawlers were mistakenly identified as those from Hong Kong.